oosperm

Etymology
From.

Noun

 * 1)  The ovum, after fusion with the spermatozoon in impregnation.
 * 2) * 1880-1881,, A Treatise on Comparative Embryology
 * It is clear that the ovum after fertilization is an entirely different body to the ovum prior to that act, and unless the use of the same term for the two conditions of the ovum had become very familiar , a special term , such as oosperm , for the ovum after the fusion with the spermatozoom, would be very convenient.