Heterodon 
with flattened heads, strikingly similar to some venomous 
serpents, as the copperhead or moccasin, but are perfectly 
harmless. Palisot dc Beau vote, 1799. 
2. [1. c.] A serpent of the genus Hetemdon. 
Also heterodont. 3. One of several genera of 
mammals and mollusks. [Not in use.] 
heterodont (het'e-ro-dont), a. and . [< Gr. 
erc/iof, other, different, + Moic, (O&OVT-) = E. 
tooth.] I. a. Having different kinds of teeth: 
having the teeth differentiated into several 
distinct kinds, as incisors, canines, and molars : 
opposed to homodont. 
In most cases . . . animals with Heterodont dentition 
are also Diphyodont. Flower, Eneyc. Brit, XV. 352. 
II. >i. 1. A heterodont animal. 2. Same 
as hi'terodon, 2. 
Heterodonta (het'e-ro-don'ta), H. pi. [NL. : 
see heterodont.'} A section or order of dimy- 
ariau bivalve mollusks, with the few hinge- 
teeth distinctly separated as cardinal and lat- 
eral, alternating, and exactly fitting into pits 
in the opposite valve. It includes a large ma- 
jority of living bivalves, as Venerieke, Unioni- 
dte, and many related families. 
Heterodontia (het'e-ro-don'shi-S), 11. pi. [NL. : 
see heterodont.] In Blyth's edition of Cuvier, 
an order of implacental mammals, correspond- 
ing to the marsupialians or pouched mammals. 
[Not in use.] 
Heterodontidae (het*e-ro-don'ti-de), n. pi. 
[NL., < He.terodontus -f- -idle.'] Same as Ces- 
traciontidce. 
heterodontoid (het'e-ro-don'toid), a. [< Hete- 
rodontus + -oid.] Pertaining to or having the 
characters of the Heterodon tidas. 
Heterodontus (hefe-ro-don'tus), . [NL.: 
see Heterodon.'} 1. Same as Cestracion. 2. A 
genus of nitidulid beetles. Murray. 
heterodox (het'e-ro-doks), a. and H. [= F. hete'- 
rodoxc = Sp. Pg. "heterodoxo = It. eterodosso, < 
Gr. ercp66o^of, of another or different opinion, 
hence holding opinions other than the 'right' 
ones (opposed to opftirfofof, orthodox), < erepof, 
other, different, + <5<ifa, opinion: see doxology.] 
1. a. 1. In theol., holding opinions not in ac- 
cord with some generally recognized standard 
of doctrine, such as the creed of a church or the 
decrees of councils ; not orthodox ; heretical. 
He asserted that I was heterodox ; I retorted to the 
charge. Goldsmith, Vicar, ii. 
Hence, in general 2. Not in accord with the 
established standard of belief. 
This opinion will, we fear, be considered as heterodox. 
Macaulay, On History. 
Il.t An opinion not in accord with that 
which is generally accepted ; a peculiar view. 
On Thursday morning we had another session, in which 
was nothing done, but that it was reasoned whether that 
last heterodox should be retained. 
Hales, Golden Remains, Balcanqual's Letter from the 
[Synod of Dort, etc. 
Not only a simple heterodox, but a very hard paradox 
it will seem, and of great absurdity, . . . if we say attrac- 
tion is unjustly appropriated unto the loadstone. 
Sir T. Browne, Vulg. Err., ii. 3. 
heterodoxly (het'e-ro-doks-li), adt. In a het- 
erodox manner. 
heterodoxness (het'e-ro-doks-nes), n. The 
character of being heterodox. 
heterodoxy (het'e-ro-dok-si), H. [= F. hetero- 
dojcie = Sp. Pg. heterodoxia = It. eterodossia, < 
Gr. hcpoAo^ia, error of opinion, < iTepodot-oc, of 
another opinion: see heterodox.] 1. The qual- 
ity or state of being heterodox : as, the hetero- 
doxy of a doctrine, book, or person. 
Heterodoxy was to a Jew but another name for disloy- 
alty. Sp. Burd, Works, VI. xx. 
2. A heterodox belief or doctrine ; a departure 
from an established standard or principle; a 
heresy. 
Felagianism and Samianism, with several other hetero- 
doxies. South, Sermon to University of Oxford, Ded. 
"I have heard frequent use," said the late Lord Sand- 
wich, in a debate on the Test Laws, "of the words ortho- 
doxy and heterodoxy ; but I confess myself at a lose to 
know precisely what they mean." "Orthodoxy, my Lord," 
said Bishop Warburton, in a whisper " orthodoxy is my 
doxy heterodoxy is another man's doxy." 
Quoted in Priestley's Memoirs, I. 572. 
heterodromous (het-e-rod'ro-mus), a. [< Gr. 
erepof, other, different, + Spo/ioc,, a running, < 
fipaueiv, run.] Running or lying in different 
directions, as leaves on the stem and branches. 
Heterodromous lever, a lever the fulcrum of which 
is between the weight and the power. 
heterodromy (het-e-rod'ro-mi), H. [As heterod- 
romatts + -y*.] In hot., a difference in direction 
of the genetic spiral in branch and parent axis : 
same as antidromy. Ooebel. 
2814 
heterogonous 
Courtier and patriot cannot mix 
Their het'rogeneiw* politics 
Without an effervescence. 
Coicper, Friendship, st. 22. 
Relatively speaking, a tree is said to be heteroyeneoun as 
mpared with the seed from which it has sprung ; and an 
hetercecious (het-o-re'shus), a. [< Gr. 
other, different, +"oor, a house.] Pertaining 
to or characterized by heteroacism. 
heteroecism (het-e-re'sizm), n. [As heterue- 
cioun + -ism.] In mycology, the development of tu ,,,j, MCU ,, .. , m . uuul ~^ .* ..<.= = P .,,. , ,.., 
different stages of the same growth on different orange is heterogeneous as compared with a wooden ball. 
host-plants ; the production of the secidiospores > ^ ke ' Co8mic phUos - l - 
or conidia of a fungus on one host, and of its 
uredospores and teleutospores on another. One 
of the commonest examples is that afforded by the rust 
(Puce/// '" //''" "' ""' ' of wheat, oats, and some of the culti- 
vated grasses. (See cut under Puccinw.) The first stage 
2. Composed of parts of different kinds; having 
widely unlike elements or constituents: op- 
posed to homogeneous. 
is passed upon the leaves of the barberry, where it consti- 
tutes what is known as the barberry-clustercupg, or bar- 
berry-rust, jEcidium Berberidii. Latr in the season, and 
usually after the rust has disappeared from the barberry, 
the uredo-stage makes its appearance upon the stem and 
leaves of wheat, oats, etc. The uredospores are soon pro- 
duced, and by their rapid germination spread the disease 
until the whole of the host>plant may be more or less af- 
fected. In the fall the teleutospores are produced, which, 
lasting over the winter, germinate in the spring only upon 
the barberry-leaves, and begin again the cycle of growth. 
heteroecisnial (het'e-re-siz'mal), a. [< heteroe- 
cism + -al.] In a heteroacious manner; pass- 
ing through different stages, or producing dif- 
ferent kinds of spores, on different host-plants. 
heterogamous (het-e-rog'a-mus), fl. [< Gr. 
erepof, other, different, + fauof, marriage.] In 
bot., bearing two kinds of flowers which differ 
sexually, as in most Composites and many Cy- 
peraccce. In the Composites the ray-flowers of the capit- 
ulnni or head may be either neuter or female, and those of 
the disk male. In the Cyperacear the male and female flow- 
ers are frequently borne in different spikes from the same 
root, or in different parts of the same spike. 
heterogamy (het-e-rog'a-mi), n. [As heterog- 
am-ous + -y.~\ The state or quality of being het- 
erogamous ; mediate or indirect fertilization of 
plants. See extract under CJiermes. 
One or more generations of sexually produced young is 
now called heterogamy. Nature, XXX. 67. 
Heterogangliata (het"e-ro-gang-gli-a'ta), n. pi. 
[NL., ueut.pl. of "heterogangliatns : seehetero- 
gangliate.] A name proposed by Professor 
Owen for all the Mollusca of Cuvier except 
the cirripeds, in accordance with a scheme of 
classification founded on the nervous system. 
heterogangliate (hefe-ro-gang'gli-at), a. [< 
NL. *heterocfangliattis,<.QtT. ertpof, other, differ- 
ent, + fdyyMov, ganglion.] Possessing a ner- 
vous system in which the ganglia are scattered 
and unsymmetrical, as mollusks; specifically, 
of or pertaining to the Heterogangliata. 
heterogenet (het'e-ro-jen), a. [< F. hetero- 
gene: see heterogeneous.'] Same as heteroge- 
neous. 
All the guests are so mere heterogene 
And strangers, no man knows another. 
B. Jonson, Magnetick Lady, 11. 1. 
heterogeneal (het"e-ro-je'ne-al), a. [As hete- 
rogenc-ous + -al.~\ Heterogeneous. [Rare.] 
This may be true, only in the Blood and Spirits of such 
fluid Farts, not in the solid and heterogeneal Parts. 
HoweU, Letters, I. i. 31. 
Inanimate substances, as water, wine, flesh, also magni- 
tude, motion, and time, are wholes homogeneal continual; 
the bodies of animals, heterogeneal continual ; numbers, 
as three, ten, are wholes homogeneal discrete ; an army, 
the church, the world, heterogeneal and of the same de- 
nomination. BurgerKdieius, tr. by a Gentleman. 
Heterogeneal numbers, numbers having opposite signs, 
heterogeneity (het'e-ro-je-ne'i-ti), n. [=F.he- 
terogeneite = Sp. heierogencidad = Pg. heteroge- 
neidade = It. eterogeneitcl ; as heterogene-ous + 
-ity."] The character or state of being hetero- 
geneous; composition from dissimilar parts; 
difference in kind or quality; disparateness; 
dissimilarity. 
Heterogeneity of function is the correlate of heteroge- 
neity of structure ; and heterogeneity of structure is the 
leading distinction between organic and inorganic aggre- 
gates, fl. Spencer, Prin. of BioL, 36. 
What a delightful heterogeneity pervades a book-lover's 
collection, even if it results only from the difference in 
size of first editions ! J. B. Been, Bookworm, p. 32. 
Obviously, as it is through differentiation that an aggre- 
gate increases in heterogeneity, so it is through integra- 
tion that an aggregate increases in deflniteness, of struc- 
ture and function. J. FMe, Cosmic Philos., I. 337. 
Law of heterogeneity, the proposition that every con- 
cept is susceptible of logical division that, however mi- 
nute a description may be, it must always leave room for 
further distinctions. 
heterogeneous (het"e-ro-je'ne-us), a. [= F. 
hetero<iee= Sp. heterogeneo = Pg. heterogeneo = 
It. eterogeneo,< ML. heterogeneus,< Gr. irtpoyfviK, 
of different kinds, in gram, of different genders, 
< Irepof, other, different, + ycvof, kind, gender : 
see genus.'] 1. Different in kind; widely dis- 
similar; unlike; foreign; incongruous. 
If there be the least settlement or heterogeneous mat- 
ter in any part of it [a liquor], shake it thoroughly, and 
it will be sure to show itself. South, Works, VI. vii. 
By a seemingly careless arrangement of his heterogene- 
ous garb, he had endeavored to conceal or abate the pecu- 
liarity. Hau'thorne, Scarlet Letter, ill. 
An object is said to be heterogenyrui when its parts do 
not ah 1 resemble one another. All known objects are 
more or less heterogeneous. J. Fike, Cosmic Philos., I. 336. 
Heterogeneous attraction, (a) An attraction between 
atoms, depending upon their being different in kind ; 
chemical attraction. (6) The attraction between the dif- 
ferent kinds of electricity and magnetism. Heteroge- 
neous body, a mechanical mixture of different chemical 
substances ; especially, in the theory of attractions and in 
optics, a body whose parts are of unequal density. Het- 
erogeneous nouns, in gram., nouns of different genders 
in the singular ;unl plural: as, Latin /oru*, u place, which is 
of the masculine gender in the singular, but either mascu- 
line or neuter in the plural. Heterogeneous number, 
a number composed of a whole number and a fraction. 
Heterogeneous principle, a principle belonging to a 
different science from the one under consideration ; a het- 
eronymous principle. Heterogeneous quantities, in 
physic*, quantities of different dimensions, as a velocity 
and an acceleration. Heterogeneous surds, in inath., 
roots whose indices are different, as a square root and a 
cube root. 
heterogeneously (het*e-ro-je'ne-us-li), adr. In 
a heterogeneous manner; so as to be hetero- 
geneous ; dissimilarly. 
They [the houses] are small, and by the necessity of ac- 
cumulating stores, where there are so few opportunities 
of purchase, the rooms are very heterogeneously filled. 
Johnson, Jour, to Western Isles. 
heterogeneousness (het'e-ro-je'ne-us-nes), . 
The character or condition of being heteroge- 
neous; heterogeneity. 
Dissimilitude of style, and heterogeneougness of senti- 
ments, may sufficiently shew that a work does not really 
belong to the reputed author. 
Johnton, Note on Shakespeare's 3 Hen. VI. 
heterogenesis (hefe-ro-jen'e-sis), n. [NL., < 
Gr. tTepof, other, different, + yeveovf, genera- 
tion.] 1. Production by an external cause 
that is, a cause different from the effect. Also 
called heterogeny. 2. In biol.: (a) The spon- 
taneous generation of animals and vegetables 
low in the scale of organization from inorganic 
elements; abiogenesis. (6) That kind of genera- 
tion in which the parent, whether {>lant or ani- 
mal, produces offspring differing in structure 
and habit from itself, but in which after one or 
more generations the original form reappears. 
Some forms of heterogenesis are called xenogenesw, par- 
thenogenesii, geneagenetit, and alternate generation. See 
biogenesis, homogenesis. 
By the other mode, the living parent was supposed to 
give rise to offspring which passed through a totally dif- 
ferent series of states from those exhibited by the parent, 
and did not return into the cycle of the parent; this is 
what ought to be called Heterogenesin, the offspring being 
altogether and permanently unlike the parent. The term 
Heterogenesis, however, has unfortunately been used in a 
different sense, and M. Milne-Edwards has therefore sub- 
stituted for it Xenogenesis, which means the generation 
of something foreign. Huxley, Lay Sermons, p. 858. 
heterogenetic (het*e-ro-je-net'ik), a. [< hete- 
rogenesis, after genetic.] ' Pertaining to or of 
the nature of heterogenesis, in any sense. 
Prof. Wundt calls his own theory of the will "the auto- 
genetic theory," opposing it to the ordinary or " hetero- 
genetic theory." Mind, XII. 289. 
heterogenist (het>e-roj'e-nist), n. [< heterogeny 
+ -ist.] One who believes in the theory of 
spontaneous generation. 
heterogeny (het-e-roj'e-ni), n. [< Gr. erepo- 
-jevf/f, of different kinds: see heterogeneous.'] 
Same as heterogenesis, 1. 
Heteroglossa (het"e-ro-glos'a), n. pi. [NL., < 
Gr. irepof, other, different, + y\acaa, tongue : see 
glossa, 2.] A prime section of scutibranchiate 
gastropods. They have pellucid teeth in five to eight 
longitudinal rows and variable in form, the larger ones 
having opaque black tips ; the shell is symmetrical ; and 
the foot has no lateral branch. The group was instituted 
by J. E. Gray for the families Dentaliidae, Tecturidae, Lepe- 
tutae, Patellidtf, and Chitonidce, which are distributed by 
recent authors among three orders. 
heterogone (het'e-ro-gon), a. Same as heterogo- 
nous. 
heterogonism (het-e-rog'o-nizm), n. [< hete- 
rogon-fius + -ism."] " The state of being hete- 
rogonous. Also heteroyoinj. 
heterogonous (het-e-rog'o-nus), a. [< Gr. i-repo^, 
other, different, + )<5w>c, generation.] In bot., 
having dissimilar reproductive organs : a term 
proposed by Asa Gray, in 1877, to include such 
