Ovum

noun

1. The mature female gamete of an animal; an egg.
2. An egg, in a broad biological sense; the proper product of an ovary; the female germ or seed, which when fertilized by the male sperm, and sometimes without such fecundation, is capable of developing into an individual like the parent.
3. [capitalized] In conchology, same as Ovulum.
4. [capitalized] In ichthyology, a genus of fishes.
5. In architecture, an ornament in the shape of an egg.