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The branch of zoology that deals with eggs, especially birds' eggs.

o′o·log′ic (ō′ə-lŏj′ĭk), o′o·log′i·cal (-ĭ-kəl) adj.
o′o·log′i·cal·ly adv.
o·ol′o·gist n.
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References in periodicals archive ?
Multitudes of gulls, fulmars, and eider-ducks, and 'alcas' hovered about the island, screaming and chattering, and evidently in a state of great perturbation at Bruin's oological researches" (Lamont, 1861:85).
That is, the oological record is more diverse than the bone record prior to the early Maastrichtianlate Maastrichtian boundary (Selles et al.
True to his Victorian roots, he had no qualms about raiding nests for eggs, and he left an extensive collection of birds' eggs and oological data that are still useful today.