Antheridium \An`ther*id"i*um\, n.; pl. {Antheridia}. [Anther + ?
(a Gr. diminutive ending).] (Bot.)
The male reproductive apparatus in the lower plants,
consisting of a cell or other cavity in which spermatozoids
are produced; -- called also {spermary}. --
{An`ther*id"i*al}, a.
[1913 Webster]