\As"ca*rid\, n.; pl. {Ascarides}or {Ascarids}. [NL.
ascaris, fr. Gr. ?.] (Zo["o]l.)
A parasitic nematoid worm, espec. the roundworm, {Ascaris
lumbricoides}, often occurring in the human intestine, and
allied species found in domestic animals; also commonly
applied to the pinworm ({Oxyuris}), often troublesome to
children and aged persons.