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

Insecta :: Insecta (n.) In the most general sense, the Hexapoda, Myriapoda, and Arachnoidea, combined..

Citigradae :: Citigradae (n. pl.) A suborder of Arachnoidea, including the European tarantula and the wolf spiders (Lycosidae) and their allies, which capture their prey by rapidly running and jumping. See Wolf spider..

Phalangoidea :: Phalangoidea (n. pl.) A division of Arachnoidea, including the daddy longlegs or harvestman (Phalangium) and many similar kinds. They have long, slender, many-jointed legs; usually a rounded, segmented abdomen; and chelate jaws. They breathe by tracheae. Called also Phalangides, Phalangidea, Phalangiida, and Opilionea..

Arachnoid :: Arachnoid (n.) One of the Arachnoidea.

Pseudoscorpiones :: Pseudoscorpiones (n. pl.) An order of Arachnoidea having the palpi terminated by large claws, as in the scorpions, but destitute of a caudal sting; the false scorpions. Called also Pseudoscorpii, and Pseudoscorpionina. See Illust. of Book scorpion, under Book..

Relbun :: Relbun (n.) The roots of the Chilian plant Calceolaria arachnoidea, -- used for dyeing crimson..

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