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"Oogonium" Definition

noun

A cell that arises from a primordial germ cell and differentiates into an oocyte in the ovary.
A female reproductive structure in certain thallophytes, usually a rounded cell or sac containing one or more oospheres.
A female sexual organ in various algae and fungi that corresponds to the archegonium of ferns and mosses.
A descendant of a primordial germ cell that gives rise to oocytes.