1. That branch of zoölogy which treats of the natural history of birds and their classification.
2. A treatise or book on this science.
ORNITHOMANCY
Or*nith"o*man`cy, n. Etym: [Gr. ornithomancie.]
Defn: Divination by means of birds, their flight, etc.
Ornithomancy grew into an elaborate science. De Quincey.
ORNITHON
Or*ni"thon, n. Etym: [L., fr. Gr.
Defn: An aviary; a poultry house. Weale.
ORNITHOPAPPI
Or*ni`tho*pap"pi, n. pl. Etym: [NL., from Gr. (Zoöl.)
Defn: An extinct order of birds. It includes only the Archæopteryx.
ORNITHOPODA
Or`ni*thop"o*da, n. pl. Etym: [NL. See Ornitho-, and -poda.]
(Paleon.)
Defn: An order of herbivorous dinosaurs with birdlike characteristics in the skeleton, esp. in the pelvis and hind legs, which in some genera had only three functional toes, and supported the body in walking as in Iguanodon. See Illust. in Appendix.