noun, plural an·ther·id·i·a [an-thuh-rid-ee-uh] /ˌæn θəˈrɪd i ə/. Botany, Mycology.
Related formsan·ther·id·i·al, adjective
Examples from the Web for antheridium
The index reference for "Antheridium" should probably be 159, rather than 150, but was not changed.The Elements of Botany|Asa Gray
The prothallus is exceedingly small, being little more than a group of cells forming an antheridium.How to Know the Ferns|S. Leonard Bastin
One of the minute organs developed in an antheridium, corresponding to pollen-grains.
These cells, especially the outer ones, develop a great amount of a red pigment, giving the antheridium its characteristic color.Elements of Structural and Systematic Botany|Douglas Houghton Campbell
It is remarkable that amongst these fungi the tube projected by the antheridium effects fecundation only by contact.Fungi: Their Nature and Uses|Mordecai Cubitt Cooke