O`o*go"ni*um (?), n.; pl. L. Oogonia (#), E. Oogoniums (#). [NL., fr. Gr. an egg + offspring.] Bot.
A special cell in certain cryptogamous plants containing oospheres, as in the rockweeds (Fucus), and the orders Vaucherieae and Peronosporeae.
© Webster 1913.