Defn: A disease in hawks, characterized by the presence of small threadlike worms, also of filaments of coagulated blood, from the rupture of a vein; — called also backworm. Sir T. Browne.

FILAR
Fi"lar, a. Etym: [L. filum a thread.]

Defn: Of or pertaining to a thread or line; characterized by threads stretched across the field of view; as, a filar microscope; a filar micrometer.

FILARIA
Fi*la"ri*a, n. Etym: [NL., fr. L. filum a thread.] (Zoöl.)

Defn: A genus of slender, nematode worms of many species, parasitic in various animals. See Guinea worm.

FILARIAL
Fi*la"ri*al, a.

1. (Zoöl. & Med.)

Defn: Of, pertaining to, or caused by, filariæ and allied parasitic worms.

2. Straight, as if in a line; as, the filarial flight of birds.

FILARIASIS
Fil`a*ri"a*sis, n. [NL.] (Med.)