\Phal`an*goi"de*a\, n. pl. [NL., from Phalangium
the daddy longlegs (see {Phalangious}) + Gr. ? form.]
(Zo["o]l.)
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
trache[ae]. Called also {Phalangides}, {Phalangidea},
{Phalangiida}, and {Opilionea}.