hemisphere 
Fi!J. 3. 
Magdeburg Hemispheres. Fig. I, separated. Fig. 2, exhausted. 
air is exhausted, great force is required to separate the 
hemispheres. Northern and southern hemispheres, 
the halves of the globe north and south of the equator, or 
corresponding divisions of the heavens or celestial globe. 
hemispheric (hem-i-sfer'ik), a. [= F. ln'/ni- 
spherique = It. emisferico, < NL. hemispheeri- 
ciis, < L. Itemisphcerium, hemisphere: see hemi- 
sphere.] Same as hemispherical. 
A pyrites, placed in the cavity of another of an hemi- 
spherick figure, in much the same manner as an acorn in 
its cup. Woodward, Fossils. 
hemispherical (hem-i-sfer'i-kal), a. [< hemi- 
spheric + -al.] Having the form of a hemi- 
sphere: as, a hemispherical body. 
That we call a fayrie stone, and is often found in gravel- 
pits amongst us, being of an hemigphf.rical figure, hath 
five double lines arising from the center of its basis, which, 
if no accretion distract them, do commonly concur ana 
meet in the pole thereof. Sir T. Broicne, Vulg. Err., ii. 1. 
I saw a pedestal of the earthy trachyte, covered by a 
hemitpherical portion of a vein, like a great umbrella, 
sufficiently large to shelter two persons. 
Darwin, GeoL Observations, 1. 62. 
hemispheroid (hem-i-sfe'roid), . [< hemi- 
+ spheroid.] A solid whose figure is approxi- 
mately but not exactly that of a hemisphere. 
heniispheroidal (hem'i-sfe-roi'dal), a. [< 
hemispheroid + -al.] Having the form of a 
hemispheroid. 
For the minuter examination of the corneulei, . . . 
these must be separated from the hemispheroidal mass. 
W. B. Carpenter, Micros., 027. 
hemispherule (hem-i-sfer'6'1), n. [< heini- + 
spherule, q. v.] A half-spherule. 
hemistich (hem'i-stik), H. [< L. liemisticliiuni, 
< Gr. fj/iujTixiov, a half -Hue, < qftt--, half, + ori^of, 
a row, line, verse. Cf. distich, acrostic 1 , etc.] In 
pros. : (a) The exact or approximate half of a 
line or verse ; one of the two commata or sec- 
tions of a line divided by the cesura or diere- 
sis. (6) Any group of words forming part of a 
line, and considered or cited by itself; an in- 
complete or unfinished line. 
Virgil . . . will rather break off in an hemistich, than 
that the line should be lazy and languid. 
Garth, tr. of Ovid's Metamorph., Pref. 
(c) A colon, comma, or group of feet of less 
extent than the average line, or than the other 
lines of the same poem or stanza, standing 
metrically by itself, or so written, as, for ex- 
ample, an epodic line, ephymnium, or refrain, 
hemistichal (hem'i-stik-al), a. [< hemistich + 
-al.] Pertaining to or constituting a hemistich 
or hemistichs : as, a liemistichal colon or line; 
a hemistichal division of a verse. 
The reader will observe the constant return of the he- 
mistichal point, which I have been careful to preserve and 
to represent with exactness. 
T. Warlun, Hist. Eng. Poetry, L, Additions. 
hemisymmetry (hem-i-sim'e-tri), . [< Gr. 
fifti-, half, + avfifierpfa, symmetry.] Same as 
hemihedrism. 
Hemitelia (hem-i-te'li-a), n. [NL., < Gr. i/fin-f- 
>j?f. half-finished, < ;///;-, half, 4- re/tof, end.] A 
genus of tree-ferns, of the suborder Polypodia- 
cees, with large pinnate or decompound fronds. 
The sori are solitary, globose, situated below the apex of 
a lateral vein or veinlet, generally near the margin. About 
20 species are known, all natives of the tropics, and mostly 
of South America. //. Brunoniana, of the mountainous 
districts of India, is a handsome fern, often attaining a 
height of 40 feet. H. Smithii, Smith's tree-fern, of New 
Zealand, is a hardy species adapted to cultivation. Some- 
times incorrectly written Hemithelia. Robert Brown, 1810. 
Hemiteliese (hem"i-te-li'e-e), n. pi. [NL., < 
Hemitelia + -eai.] A division of the polypodi- 
aceous ferns of the tribe Cyathece, established 
by Preal in 1839, and typified by the genus He- 
mitelia,. 
hemitone (hem'i-ton), . [< Gr. ^novuov, a half- 
tone, < fifu-, half, + rovof, a tone.] In Gr. music, 
the interval of a half-tone ; a perfect fourth 
less two tones, represented by the ratio 256 : 243 : 
not exactly equivalent to a modern semitone. 
hemitrichous (he-mit'ri-kus), a. [< Gr. jfu-, 
half, + Opi$ (TP/X-), hair.] In bot., half covered 
with hairs. [Not used.] 
Hemitripteridae (hem*i-trip-ter'i-de), n. pi. 
[NL., < Hemitripterus + -<te.] A family of 
acanthopterygian fishes, represented by- the ge- 
nus Hemitripterus alone. It embraces Cottoidea with 
a dorsal fln consisting of a very long acanthopterous and 
short arthropterous portion, incomplete subjugular or tho- 
racic ventrals with one spine and three soft rays, inflated 
2790 
head with prominent orbits, branchial apertures confluent, 
but with the branchial membrane broad mid continuous 
below, the trunk antrorsiform, and the vertebra? numerous 
(for example, 16 abdominal + 23 caudal). 
Hemitripterus (hem-i-trip'te-rus), n. [NL., < 
Gr. ///(-, naif , + rprif (rpi-), = E. three, + irrcpov, 
wing, fin, = 'E. feather.'] The typical genus of 
the family Hemitripteridcc. 
hemitropal (hem'i-tro-pal), a. [As hemitropo 
+ -al.] Same as hemitropous. 
hemitrope (hem'i-trop), a. and n. [< Gr. rifu-, 
half, + Tporn/, a turning.] I. a. Half -turned: 
specifically applied in mineralogy to a com- 
pound or twin crystal which has two similar 
parts or halves, one of which is turned half 
round upon the other. 
II. . 1. Anything that is hemitropous in 
structure. 2. A twin crystal. 
hemitropic (hem-i-trop'ik), a. [As hemitrope 
+ -c.] Half -turned; hemitropous. 
In a good deal of the felspar, however, the edges of the 
hemitropic lamellae are too blurred to allow the exact angles 
to be taken. 
F. W. Rvdler, GeoL Mag., N. S., III., Dec. iii. 267. 
hemitropous (he-mit'ro-pus), a. [As hemitrope 
+ -ous.] Turned half" round ; half -inverted : 
specifically applied in botany 
to an ovule in which the axis 
of the nucleus is more curved 
than in an anatropous ovule. 
Also hemitropal. 
hemitropy (hem'i-tro-pi), . 
[As hemitrope + -y.] Twin 
composition in crystals. 
hemitype (hem'i-tip), . [< 
Gr. 'i/Ji-, half, + riVcc, impres- 
sion (type).] That which is 
hemitypic. 
hemitypic (hem-i-tip'ik), . 
[As hemitype + -ic.] In zool., only partly typi- 
cal of a given group, in consequence of pur- 
taking of the characters of some other group. 
Thus, a heinUyjiic bird is one which, as those of the genus 
Archtxopteriix, shares many characters of the reptilian 
type, and by so much departs from the avian type. 
hemlock (hem'lok), . [< ME. hcmlok, also 
written liumlok, httmloke, liomelok, irreg. < AS. 
hemlic, liymelie (gen. hemlices), also hymlice(gen. 
liymlican), oldest form hymblicaj, hemlock; ap- 
par. < hem-, hym-, of unknown origin, + -lie , -lice. 
a termination supposed to be identical with 
that in AS. cerlic, E. charlock, and late AS. b&riic, 
E. barley: see barley 1 .] 1. A poisonous plant, 
Conium maculatum, of the natural order Vmbelli- 
ferat. It is a tall, erect, branching biennial, with a smooth, 
shining, hollow stem(usually marked with purplish spots), 
elegant much-divided leaves, and white flowers in com- 
pound umbels of ten or more rays, surrounded by a gen- 
eral involucre of from three to seven leaflets. It is found 
Hemitropous Seed. 
A, chalaza; A.hiluin; 
r, raphe ; o, orifice. 
Flowering Umbels and Leaves of Hemlock \Conitim maenlatum], 
a, flower ; b, fruit ; c, hetnicarp cut transversely. 
throughout Europe and temperate Asia in waste places, on 
banks, and under walls. It is said to be fatal to cows, 
while horses, goats, and sheep may feed upon it without 
danger. The poison administered to Socrates, and in com- 
mon use for the execution of criminals in ancient Athens, 
is supposed to have been a decoction of it, though some 
think that this potion was obtained from water -hemlock 
(Cicuta mrosa). Hemlock is a powerful sedative, and is 
used medicinally. The extract is considered the best prep- 
aration. It is often serviceable as a substitute for or an 
accompaniment to opium. It has been found very useful 
in chronic rheumatism and in whooping-cough, and in al- 
laying the pain of irritable sores and cancerous ulcers. 
hemoglobinemia 
The virtues of hemlock reside in an alkaline principle 
termed canine or coma, which is most abundant in the 
fruit and seeds. See canine. 
Round about the caldron go ; 
In the poison'd entrails throw. . . . 
Root of hemlock digg'd i' the dark. 
Shak., Macbeth, iv. 1. 
As touching hemlocke, it is also a ranke poyson, wit 
nesse the publike ordinance and law of the Athenians, 
whereby malefactors who have deserved to die were 
forced to drinke that odious potion of hemlocke. 
Holland, tr. of Pliny, xxv. 13. 
Beneath an emerald plane 
Sits Diotima, teaching him that died 
Of hemlock. Tennyson, Princess, iiL 
2. The hemlock-spruce Hemlock stork's-bill, 
the stork's-bill, Erodium cicutariunf : so named because 
the dissected leaves resemble those of the hemlock. 
hemlock-dropwort (hem'lok-drop"wert), . 
See (Knaiithc. 
hemlock-parsley (hem'lok-pars'li), n. An um- 
belliferous plant, of two species, Conioselinum 
Fischeri and C. Canadense, resembling hemlock, 
but not poisonous. 
hemlock-pitch (hem'lok-pich), n. A pitch ob- 
tained from the hemlock-spruce, Fix Canaden- 
sis of the apothecaries. 
hemlock-spruce (hem'lok-spros), . An Amer- 
ican fir, the Tsuga Canadensis: so called from 
the resemblance of its branches in tenuity and 
position to the leaves of the common hemlock, 
Conium maeulatum: commonly called simply 
hemlock. The bark is much used in tanning; combined 
with that of oak, it is thought to make the best leather. Lea- 
ther tanned with the bark of hemlock alone has a red color, 
and is inferior. The California!) hemlock is Tfuga Her- 
tensiana ; that of the Southern States is T. Caroliniana. 
The ground-hemlock is the dwarf yew of eastern North 
America (Taxu* baccata, var. Canailengiji), a straggling 
bush with flat distichous leaves resembling those of the 
hemlock-spruce. 
hemmel (hem'l), n. A Scotch form of hemble. 
hemmer (hem'er), . [< hem 1 , v., + -er 1 .] One 
who or that which hems; specifically, an at- 
tachment or adjunct to a sewing-machine by 
means of which H hem is made. 
hemming 1 (hem'ing), . [Verbal n. of hetl,v.] 
1. The process of making a hem, as in sew- 
ing a garment. 2. The stitch by which a 
hem is secured; the doubled edge of a fabric 
hemmed down to the fabric itself; collectively, 
the hem or hems: as,the/ifimi<7wasdecorated 
with embroidery. German hemming, a method of 
uniting two pieces of textile material in which the raw 
edges of both are turned down together, and the fold so 
produced is sewed to the piece of stulf, against which it 
comes as in ordinary hemming. 
hemming'-', himming (hem'-, him'ing), . [< 
ME. heminge, < AS. hemming (once in a gloss), a 
rough shoe: cf. Icel. hemingr, hfimunar, the skin 
of the shanks of a hide : see under hambk.] A 
shoe or sandal made of rawhide. Simmonds. 
hemo-. See hemato-. 
hemocoele, haemoccele (hem'o-sel), . [< Gr. 
aifia, blood. + mi/Ja, the large cavity of the 
body.] The general body-cavity or vascular 
tract of arthropods and mollusks, analogous to 
the creloma of a vertebrate. 
The main vascular tracts, therefore, are five in number, 
or, to put it in another way, the htvjnoccele is divided into 
live main chambers. Jour, of Micros. Science, XXVIII. 384. 
hemocyanin, haemocyanin (hem-6-sJ'a-nin), . 
[< Gr. aifia, blood, + KVO.VOS, blue, + -.] The 
coloring matter of the blood of various inver- 
tebrates. It contains copper. It is blue when 
oxidized, and colorless in the deoxidized state. 
hemodrometer,h8emodrometer(hem-o-drom'- 
e-ter), . [< Gr. aifia, blood, + d/io/a*;, course, + 
/itrpov, a measure.] An instrument used to mea- 
sure the velocity of the movement of the blood. 
heniodromograph, hsemodromograph (hem-o- 
drom'o-graf), n. [< Gr. a\/M, blood, + <Sp6ftof, 
a running, course, + ypafyeiv, write.] A self- 
registering instrument which records the ve- 
locity of the blood. 
hemo'dromometer, haemodromometer (hem'- 
o-dro-mom'e-ter), n. Same as hcmodrometer. 
hemogastrie (hem-o-gas'trik), a. [< Gr. al/M, 
blood, + E. gastric.] Pertaining to the blood 
and the stomaeh.-Hemqgastric fever. See/euer. 
hemoglobin, haemoglobin (hem-o-glo'bin), n. 
[< Gr. a'lfia, blood. + L. globiis, a ball, + -tn 2 .] 
The red substance which forms about nine 
tenths of the dry constituents of the red blood- 
corpuscles and serves as the carrier of oxygen 
in the circulation. It is crystallizable, and can be 
resolved into hematin and a proteid residue. It has the 
property of combining loosely with oxygen, and this 
compound is called uxyhemoglobin, while physiologists 
reserve hemoglobin for the deoxydized substance. Also 
called hemoglobulin, hematoglnbin, hematoglobulin, hema- 
tocrytttallin, chromatin, and cruorin. 
hemoglobinemia, haemoglobinaemia (hem-o- 
glo-bi-ne'mi-a), n. [NL. hcemoglobincemia, < 
