noun, plural an·ther·id·i·a [an-thuh-rid-ee-uh] /ˌæn θəˈrɪd i ə/. Botany, Mycology.
Examples from the Web for antheridia
Among the antheridia are borne peculiar hairs (Fig. 59, p) tipped by a large globular cell.Elements of Structural and Systematic Botany|Douglas Houghton Campbell
De Bary and Pringsheim believe that these organs constitute the antheridia of the species of Saprolegnia to which they belong.Fungi: Their Nature and Uses|Mordecai Cubitt Cooke
The superficial layer of cells bounding the cavity does not break down until the antheridia are nearly mature.
Antheridia 3–20, in the axils of small saccate leaves, which are scarcely imbricate or crowded into terminal heads.
The same moisture which caused the antheridia to open also brings about the opening of the archegonia.How to Know the Ferns|S. Leonard Bastin