"an egg," in a broad biological sense; "the proper product of an ovary," 1706, from Latin ōvum "egg," cognate with Greek ōon, Old Norse egg, Old English æg, from PIE *ōwyo‑, *ōyyo‑ "egg," which is perhaps a derivative of the root *awi- "bird." The proper plural is ova.
"having the longitudinal shape of an egg, elliptical," 1570s, from Modern Latin ovalis "egg-shaped" (source of French oval, 1540s), literally "of or pertaining to an egg," from Latin ovum "egg" (see ovum). The classical Latin word was ovatus (source of ovate (adj.)). Related: Ovalness (1727); ovality (1823). Oval Office "office of the president of the United States in the White House" has been used since 1942 metonymically for "the presidency."
"a little egg," especially one not yet matured and discharged from the ovary of a female mammal, 1821, from French ovule and directly from Modern Latin ōvulum, literally "small egg," diminutive of Latin ōvum "egg" (see ovum).
"Easter," also "Passover," early 12c., Pasche, Paske; see paschal. Now archaic. Pasch-egg "Easter egg" is from 1570s.
white of an egg (used as a varnish), c. 1300, from Old French glaire "white of egg, slime, mucus" (12c.), from Vulgar Latin *claria (ovi) "white part (of an egg)," from Latin clarus "bright, clear" (see clear (adj.)). Related: Glaireous.
1560s, "a plane figure in the general shape of the lengthwise outline of an egg," from French ovalle "oval figure," from noun use of Medieval Latin ovalis "of or pertaining to an egg," from Latin ovum "egg" (see ovary). The earliest use of the word in English (mid-15c.) was in reference to a Roman crown awarded as the symbol of an ovatio (see ovation).