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Arachnology :: Arachnology (n.) The department of zoology which treats of spiders and other Arachnida.

Chelicera :: Chelicera (n.) One of the anterior pair of mouth organs, terminated by a pincherlike claw, in scorpions and allied Arachnida. They are homologous with the falcers of spiders, and probably with the mandibles of insects..

Tant :: Tant (n.) A small scarlet arachnid.

Arthropoda :: Arthropoda (n. pl.) A large division of Articulata, embracing all those that have jointed legs. It includes Insects, Arachnida, Pychnogonida, and Crustacea..

Arachnidial :: Arachnidial (a.) Pertaining to the arachnidium.

Arthrogastra :: Arthrogastra (n. pl.) A division of the Arachnida, having the abdomen annulated, including the scorpions, harvestmen, etc.; pedipalpi..

Scorpiones :: Scorpiones (n. pl.) A division of arachnids comprising the scorpions.

Arachnidial :: Arachnidial (a.) Of or pertaining to the Arachnida.

Solifugae :: Solifugae (n. pl.) A division of arachnids having large, powerful fangs and a segmented abdomen; -- called also Solpugidea, and Solpugides..

Palpus :: Palpus (n.) A feeler; especially, one of the jointed sense organs attached to the mouth organs of insects, arachnids, crustaceans, and annelids; as, the mandibular palpi, maxillary palpi, and labial palpi. The palpi of male spiders serve as sexual organs. Called also palp. See Illust. of Arthrogastra and Orthoptera..

Daddy Longlegs :: Daddy longlegs () An arachnidan of the genus Phalangium, and allied genera, having a small body and four pairs of long legs; -- called also harvestman, carter, and grandfather longlegs..

Scorpion :: Scorpion (n.) Any one of numerous species of pulmonate arachnids of the order Scorpiones, having a suctorial mouth, large claw-bearing palpi, and a caudal sting..

Thorax :: Thorax (n.) The second, or middle, region of the body of a crustacean, arachnid, or other articulate animal. In the case of decapod Crustacea, some writers include under the term thorax only the three segments bearing the maxillipeds; others include also the five segments bearing the legs. See Illust. in Appendix..

Chela :: Chela (n.) The pincherlike claw of Crustacea and Arachnida.

Mite :: Mite (n.) A minute arachnid, of the order Acarina, of which there are many species; as, the cheese mite, sugar mite, harvest mite, etc. See Acarina..

Araneina :: Araneina (n. pl.) The order of Arachnida that includes the spiders.

Octopoda :: Octopoda (n.pl.) Same as Arachnida.

Spider :: Spider (n.) Any one of numerous species of arachnids comprising the order Araneina. Spiders have the mandibles converted into poison fangs, or falcers. The abdomen is large and not segmented, with two or three pairs of spinnerets near the end, by means of which they spin threads of silk to form cocoons, or nests, to protect their eggs and young. Many species spin also complex webs to entrap the insects upon which they prey. The eyes are usually eight in number (rarely six), and are situated on t

Stigma :: Stigma (v. t.) One of the apertures of the pulmonary sacs of arachnids. See Illust. of Scorpion.

Trachea :: Trachea (n.) One of the respiratory tubes of insects and arachnids.

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