Dictionary.net

• The female reproductive organ in certain Thallophytes ; the mother egg-cell.

1920 - A dictionary of scientific terms.
By Henderson, I. F.; Henderson, W. D.

• The cell from which an ovum is derived. [Gr.]

• The female element of a fungus, which when fertilized forms the oospore. [Gr.]

1916 - Appleton's medical dictionary
By Smith Ely Jelliffe