[ ˌanθə'rɪdɪəm ]
■ noun ( plural antheridia -dɪə ) Botany the male sex organ of algae, mosses, ferns, fungi, and other non-flowering plants.
Derivatives
antheridial adjective
Origin
C19: mod. L., from anthera (see anther ) + -idium (from the Gk dimin. suffix -idion ).