Definify.com

Webster 1913 Edition

Noun.

[Gr. [GREEK];

ὄρνις

ὄρνιθος

, a bird + [GREEK] divination: cf. F.

ornithomancie

Divination by means of birds, their flight, etc.

Ornithomancy

grew into an elaborate science.

De Quincey.

Noun.

[Gr. a fowl, and divination.]

Augury, a species of divination by means of fowls, their flight, &c.

ornithomancy ‎(uncountable)

Divination by means of birds, their flight, etc.
(Can we find and add a quotation of De Quincey to this entry?)