chela 
A three-jointed appendage, the second Joint of which 
is prolonged in such a manner as to form with tin- third 
a plncer or ehflii. lluxlnj, Anat. Invert., p. >>. 
2. The similar nipper- or pinccr-liko claw ter- 
minating the chelicera of an arachuidan, as a 
scorpion. In these two senses also cltde. 3. 
[_cn l>. | A geuus of cyprinoid fishes. 
chela'-, ". See tikeelv-. 
chelandret, An obsolete form of calandra. 
chelaship, . Kee clici-lnxl/i/i, 
chelate (ke'lat), </. [< XL. i-hclatuy, < c/icto,q. v.] 
Having a chela ; terminated by a chela or for- 
ceps-joint. 
By being clielalf, tliat is, by having the posterior distal 
, 
angle of the propodite produced so as to equal the dac 
tylo|iodite in len 
bit- linger for it. 
length, and thu* cmistitnte a sort of opposa- 
llujclr.y, Anat. Invert., p. 270. 
. 
chciiccra of 
11 
Chelate joint or appendage, in tutnm., one which can 
be turned back on the supporting purl, as the ungues or 
claws nl' certain insects. 
chelaundret, An obsolete form of ealandrn. 
cheldt, !'. ' [ME. cltclilen, <AS. "cealdian, also 
in coinp. wml'limi, become cold, < ccald, cold: 
see cold, it. and /.] To become cold; chill. 
Kymcnhild him gan bihelde, 
Him lieorte bigan t(i rhflde. 
Kim, Horn (E. E. T. S.), 1. 1H8. 
cheleH, . A Middle English form of chill 1 . 
chele 2 (ke'le), n. Same as chela 1 , 1 and 2. 
chelerythria (kel-e-rith'ri-ii), n. [NL., as chcl- 
crytltr-iii + -m 1 .] Chelerythrin. 
chelerythrin, chelerythrine (kel-e-ritli'rin), . 
[< Clui( iilon In HI ) + Gr. IpvSptt, red, + -iift, -iitc?. ] 
An alkaloid (C 1 gH 17 NO 4 ) found in the plants 
Chelidonium majus, Olaucium luteum, and San- 
giiinaria Canadensis, and thought to be identical 
with sanguinarin. 
chelicera (ke-lis'e-ra), n. ; pi. chelicera (-re). 
[NL., < Gr. x'i^n,'s: claw, + ntpaf, a hop.] 1. 
One of the anterior pair of ap- 
pendages of a scorpion ; a short, 
three-jointed organ ending in 
a prehensile claw. See cut 
under scorpion. 2. The cor- 
responding organ in a spider, 
which terminates in a sharp 
joint folding down on the 
mai joint. At. preceding one like the blade 
of a pocket-knife on the han- 
die, and having at its extrem- 
ity the opening of a poison- 
gland. This gland U not found in the chellceree of the 
scorpions. These organs are supposed by some natural- 
ists to be the homologues of the antennae of insects, but 
others believe that they correspond to the mandibles. 
In the ArachnUla these antenna; are converted into 
mouth organs; in the Scorpions and Spiders they are 
known as chelicerae. 
Oegenbaur, Comp. Auat. (trans.), p. 244. 
Also in English form chelicere. 
cheliceral (ke-lis'e-ral), a. [< chelicera + -al."\ 
Of, pertaining to, or of the nature of a cheli- 
cera, or prehensile claw. 
The two palpi are developed from the pedipalpal por- 
tion of the proboscis ; two horny hooks from the cheliceral 
portion ; and, finally, the hinder pair of thoracic limbs is 
added. Huxley, Anat. Invert., p. 331. 
chelicere (kel'i-ser), n. Same as chelicera. 
chelichnite (ke-lik'mt), n. [< Gr. ^fAtif, a tor- 
toise, + Ixvor,, track, + -i<e 2 .] The fossilized 
impression of a cheloniau. 
Chelididae. w. pi. See Chelydid<e. 
chelidon (kel'i-don), n. [NL., <Gr. %eAi6uv, a 
swallow, also (in allusion to the forking of the 
swallow's tail) the frog in the hollow of a 
horse's foot, a hollow above the bend of the 
elbow, etc. ; = L. Atrundo(n-), a swallow.] 1. 
In anat., the hollow at the bend of the elbow. 
2. [cap."] In ornith., a genus of swallows, the 
type of which is the common European house- 
swallow, Chelidon urbica. Boic, 1822. 
chelidonia (kel-i-do'ni-a), n. [NL., < Chelido- 
nium.] Same as chelidonin. 
chelidonic (kel-i-don'ik), a. [< Chelidon-ium + 
-ic.] Of or pertaining to plants of the genus 
Chelidonium or celandine; existing in or de- 
rived from celandine. Chelldonic acid, CjHiO, 
an acid obtained from the plant Chelidonium majus. It 
crystallizes in silky needles. 
chelidonin, chelidonine (kel-i-do'nin), . [< 
Chclidn-ium + -2, -ne 2 .] An alkaloid (Cjg 
H 1 ^N 3 O 3 ) obtained from the plant Chelidonium 
maius. Also chelidonia. 
chelidoninic (kel"i-do-nin'ik), a. [Irreg. < chel- 
idonin + -ic.] Derived from plants of the ge- 
nus Chelidonium Chelidoninic add, an acid found 
in Chelidonium majus, crystallizing in white rhomboida! 
prisms. 
Chelidonium (kel-i-do'ni-um), . [NL. : see 
celandine."] A papaveraceous genus of plants, 
of only two species, of Europe and Asia. C. ma- 
in* is the common celandine. See celandine. 
60 
045 
chelidonize (kel'i-don-Iz), <. i. ; pret. and pp. 
okeUdoniged, ppr. cln'lidoni;inij. [< Gr. x c ?-"'- 
vifetv, sing the "swallow-song" (^e/udov/o/ja), 
< ;r*:A<(!<Ov, a swallow : see chelidon.] To sing the 
"swallow-song"; go from house to house sing- 
ing and soliciting gifts: a custom among boys 
in ancient Greece about the time when tne 
swallows returned. [Bare.] 
Chelidonomorphae (kel-i-do-no-mor'fe), . />/. 
[XL.. < (ir. \:'/iriav, a swallow, + /jopt'/, form.] 
In Suudevall's system of ornithological classi- 
fication, the swallows, considered as a super- 
family group of one family, fliritniliiiiila : sy- 
nonymous with Lont/ipennes of the same author. 
Chefidoptera (kel-i-dop'te-rii), H. [XL. (J. 
Gould, 1836), < Gr. xf/ifuv, a swallow, + RTeptfv, 
a wing.] A notable genus of American fissi- 
rostral barbets or puff-birds, of the family 
Smaller Swallow-wing (Cltilittofttra tenebrosa). 
Bucconidce, similar to Monasa (which see), but 
with a short square tail, comparatively longer 
wings, and smaller, slenderer bill. There are two 
species, C. teiubrosa and C. ftratnliensis, known as the 
smaller and the larger swallow-wing. 
chelidqxanthin, chelidoxanthine (kel*i-dok- 
san'thin), n. [< Chelid(oniuin) + Gr. 6f-l*f, 
sharp, + &.vSof, flower, + -m 2 , -ine 2 .] A neutral 
bitter principle, crystallizing in small yellow 
needles, obtained from the plant Chelidonium 
majus. 
Chelidridse (ke-lid'ri-de), n. pi. An improper 
spelling of Chelydridce. 
chelifer (kel'i-fer), n. [NL. chclifer, < chela*, q. 
v., + L. /errc = E. heart.'] 1. One of the C/<eK- 
feridea ; a false i scorpion. 2. [cap."] A genus 
of pseudoscorpions, typical of the family Clte- 
liferidai, including book-scorpions with two 
eyes, as C. cancroides, a small species often 
found in musty old books. 
Cheliferidae (kel-i-fer'i-de), . pi. [NL., < 
Chelifer, 2, + -idte."] A family of pseudoscor- 
pions, or false scorpions, of the order Cheliferi- 
dea or Pseudoscorpiones, typified by the genus 
Chclifer. They are minute harmless forms resembling 
a scorpion in front, but with a body flat and rounded be- 
hind and destitute of a tail. They live in moist dark 
places, and feed chiefly on mites and wood-lice. 
Cheliferidea (keHi-fe-rid'e-a), n. pi. [NL., 
< Chelifer, 2, + -idea.] An order of the class 
Arachnida, containing the false scorpions or 
pseudoscorpions, having the abdomen seg- 
mented, indistinctly separated from the cepha- 
lothorax, and without the appendage with its 
poisonous sting which characterizes the true 
Scorpions. The maxillary palpi or pedipalps are longer 
than the thoracic limbs, and end in a chela or pincer-like 
prehensile claw. There are two families, the Obi#iid& 
with four eyes, and the Cheliferidce with two eyes. The 
order includes the book-scorpions. Generally called Psm- 
doicorpionet. 
Like the Spiders the Cheliferidea are provided with silk 
glands, aud unlike the Scorpions, which they externally 
resemble, they have neither a postabdomen nor poison- 
glands. They breathe by tracheae. These Arachnids are 
of small size, and are found chiefly in caverns and damp 
places in temperate countries. Pascoe, Zool. Class., p. 95. 
cheliferous (ke-lif'e-rus), a. [As chelifer + 
-OMS.] Having cliens: said of the chelate limbs of 
crustaceans, and of animals which have chelse. 
Cheliferous abdomen, one furnished at the apex with 
strong and thick forceps, somewhat resembling the great 
claw of a scorpion. Cheliferous slaters, the cursorial 
isopod crustaceans of the genus Tanai*. 
cheliform (ke'li-f6rm), a. [< NL. chela 1 , q. v.. 
-t- L. forma, form.] Having the form of a 
chela, cheliped, or chelicera; like the great 
claw of a lobster or crab ; pincer-like. 
chelingue (che-lingg'), . [E. Ind.] Same as 
musoma-boat. 
cheliped (ke'li-ped), n. [< NL. chela 1 , q. v., + L. 
pes (ped-) = E.foot.] One of the large special- 
ized chelate limbs of a crustacean, as the great 
claw of a lobster, modified to form a prehen- 
sile rather than a natatorial organ. See chela*. 
Chelonia 
chelis 1 (ke'lis), H. [NL., < Gr. x>/''J, claw: 
see cheloid^.] Same as CneloUP. 
chelis-, . An erroneous form of kelin. 
Chelodina (kel-o-di'nii), w. [NL., < Gr. ^/.UT, 
a tortoise, + ficivuc., terrible, mighty, large.] A 
genus of turtles, related to Chclys, typical of the 
group ' 'In /iiiliiii-n (which see). C. lonyicollis is 
an example. 
chelodine (kd'o-din), . [< CMtodtnaJ A tur- 
tle or river-tortoise of Australia, of the genus 
< In l<xli nn. 'I'he luniMii ' k< ( rh- loilhif, C". /oji ;. 
has a I'HIL', tlrMlilr. unll ]v t nil I i If III rk and It ll:it, ]i;ir] i>w 
pointi'il ln'ad. It is an active species, traversing rajiiilh 
the rivt-rs and poolH in \vlmh it liv<-w. 
Chelodines (kel-o-di'nez), . pi. [NL., in-eg. 
< cliclodina. Cf. ', cliehdiiic.] In zoiil., a nann- 
given by Huxley to a subdivision of Emi/dea, in 
which the pelvis is fixed to the carapace and 
plastron, the neck bends sidewise, and the head 
cannot be completely withdrawn beneath the 
carapace. Same as PlMtrotUra. 
cheloid 1 (kel'oid), . [< Gr. jt/Uf, a tortoise, + 
<oV, form. But cf. chclydoid.] Same as chely- 
doid. 
cheloid 2 (ke'loid), n. f< Gr. xnW* a claw, hoof, 
+ tMof, form; according to some, < x^-Wi a 
tortoise ; cf. cheloid^. Also written keloid, or 
celoid, by confusion with kelis, < Gr. m'f/r/, a tu- 
mor : see kelis.] A raised fibrous tumor (fibro- 
ma) of the skin, with spurred contours, apt to 
return in its site if cut out, but not dangerous. 
Also called Alibert'y cheloid, Alibert'y chctoma, 
chelis, and formerly sometimes cancroid Addl- 
son'B cheloid, a misnomer for AUiliimi'i telit. See ktlu. 
cheloma (ke-16'ma), n. ; pi. chetomata (-ma-ta). 
[NL., < Or. MX& a claw, + -oma. See chelind*.] 
Same as cheloid^. 
Chelone (ke-16'ne), n. [NL., < Gr. x t ^^ m >t a 
tortoise.] 1. A genus of turtles; the green 
turtles, such as Chelone midas, and the hawk's- 
bill or tortoise-shell turtle, Chelone imbricata. 
Also written Chelonia. See cut under Cheloni- 
dce. 2. In hot., a small genus of scrophularia- 
ceous perennial plants, in which the corolla is 
inflated, arched, and nearly closed, so as to re- 
semble the head of a tortoise, whence the name : 
related to Pentstemon. The species are natives of 
the United States, and the most common one, C. glabra, 
is occasionally cultivated and popularly known as intake- 
head or turtle-head. 
Chelonea (ke-16'ne-a), w. pi. [NL. (Fleming, 
1822).] Same as Chelonia, 1. 
Chelonia (ke-16'ni-a), n.pl. [NL., < Gr. x^^i, 
a tortoise. Cf. Chelys.] 1. The Testudinata or 
shield-reptiles; the turtles and tortoises; an 
order of Rep- 
tilia, in which 
the body is in- 
closed in a shell 
consisting of a 
carapace and a 
plastron, from 
between which 
the head, tail, 
and four limbs 
protrude. These 
animals have the 
bones of the skull 
united to such a 
degree that the 
quadrates and 
pterygoids form 
part of the same 
mass as the rest ; 
there are no teeth, 
the jaws being in- 
cased in horn and 
forming a beak ; 
the eyes are pro- 
vided with eyelids; 
and a sacrum is developed. In consequence of the forma- 
tion of the shell, the cervical and caudal regions are the 
only movable parts of the spinal column ; the dorsal verte- 
brae are devoid of transverse processes ; the ribs are not 
movable upon the ver- 
tebra i and the union of 
the vertebne and ribs 
by means of superficial 
bony plates almost al- 
ways forms the cara- 
pace or upper shell, the 
lower shell or plastron 
being composed of der- 
mal bones, usually 9 in 
number, 1 median, and 
4 lateral and paired. 
Tortoise-shell is the pe- 
culiar epidermal or ex- 
oskeletal integument of 
the bony case. Thelnngs 
extend Into the alidomi- 
Plastron of Cfulane midas. nul cavity with the Oth* 
Cl, clavicle, epipl.istron, or epister- er viscera. The Chelo- 
num; Id, interclavicle, entoplastron. nia are generally Slug- 
or entostemum : Hyp, hyoplastnjn or g j sn cold-blooded ani- 
hyost e mum;///AhyP?plasrn>norhy. * '.1 tenacious of 
P^roum; xp. ..ph.p.a* or ,, phi - mals^very^tenack.u^of 
M 
Carapace of Chelont midas, dorsal view. 
i-8, neural plates ; Ci - C8, costal plates ; 
R, R, ribs; M, M t marginal plates; A'w, nu- 
chal plate ; Py, one oithe twopygal plates. 
cf. 
