oölogy

from The Century Dictionary.

• noun The study of birds' eggs; the department of ornithology which treats of the nidification and oviposition of birds, the specific characters of egg-shells, and the classificatory conclusions which may be deduced therefrom. See caliology.
• noun In a wider sense, the ontogeny of birds.

from the GNU version of the Collaborative International Dictionary of English.

• noun The science of eggs in relation to their coloring, size, shape, and number.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Alternative spelling of oology.