OOLOGY Meaning of OOLOGY in English — oological /oh'euh loj"i keuhl/ , adj. — oologist , n./oh ol"euh jee/ , n.the branch of ornithology that studies birds' eggs. [ 1825-35; OO- + -LOGY ] Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012