Definition

1. Noun:
   • The male reproductive structure in certain plants: An antheridium is a multicellular organ that produces and contains male gametes (called antherozoids or sperm) in cryptogams (non-seed plants) such as ferns, mosses, and algae. It is functionally analogous to the anther in flowering plants.

Usage Examples

• Noun:
  • In the life cycle of a fern, the antheridium releases sperm that swim to the archegonium.
  • The biologist studied the development of the antheridium under the microscope.

Advanced Usage

• Botanical Context: The term is used almost exclusively in botanical and biological descriptions of plant reproduction, particularly concerning bryophytes, pteridophytes, and some algae.
  • The presence of both an antheridium and an archegonium on the same gametophyte indicates it is monoecious.

Variants and Related Words

• Antheridial (adj): Relating to or of the nature of an antheridium.
  • The antheridial wall protects the developing gametes.

Synonyms

• Male gametangium: A more general term for a structure that produces male gametes.
• Sperm-producing organ: A descriptive synonym.

Noun

1. the male sex organ of spore-producing plants; produces antherozoids; equivalent to the anther in flowers