noun, plural antheridia [an-thuh-rid-ee-uh] . Botany, Mycology.
a male reproductive structure producing gametes, occurring in ferns, mosses, fungi, and algae.

1850–55; < Neo-Latin; see anther, -idium

antheridial, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
antheridium (ˌænθəˈrɪdɪəm)
n , pl -ia
the male sex organ of algae, fungi, bryophytes, and spore-bearing vascular plants, such as ferns, which produces antherozoids
[C19: from New Latin, diminutive of anthēraanther]

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American Heritage
Science Dictionary
antheridium   (ān'thə-rĭd'ē-əm)  Pronunciation Key 
Plural antheridia (ān'thə-rĭd'ē-ə)
An organ in certain organisms that produces male gametes. Antheridia are found in many groups of organisms, including the bryophytes, ferns, ascomycete fungi, and some algae. Most gymnosperms and all angiosperms, however, have lost the antheridium, and its role is filled by the pollen grain. Compare archegonium.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences for antheridia
Monoicous bryophytes produce both antheridia and archegonia on the same plant body.
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