o·vo·lo 
(ōvə-lō′)
(ōvə-lō′)n. pl. o·vo·li (-lī′)
A rounded convex molding, often a quarter section of a circle or ellipse.
[Obsolete Italian, diminutive of uovo, ovo, egg, from Latin ōvum; see awi- in the Appendix of Indo-European roots.]
ovolo