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Definition of: antheridium
(an′thə·rid′ē·əm) noun plural ·ther·id·i·a (-thə·rid′ē·ə) Bot.
The male sexual organ in cryptogams, the analog of the anther in flowering plants. Also an·ther·id (an′thər·id). [<NL, dim. of Gk. anthēros flowery]
—an′ther·id′i·al adjective
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