||Phal`an*goi"de*a (?), n. pl. [NL., from Phalangium the daddy longlegs (see Phalangious) + Gr. &?; form.] (Zoöl.) 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 tracheæ. Called also Phalangides, Phalangidea, Phalangiida, and Opilionea.