1. the male reproductive organ in certain plants, fungi, and algae that produces and releases sperm cells
Usage: botanical

Examples

• The antheridium releases sperm cells that swim to fertilize the egg.
• Mosses have both antheridia and archegonia on the same plant.
• The botanist examined the antheridium under a microscope.
• Ferns produce antheridia during their gametophyte stage.
• The antheridium is typically smaller than the female reproductive structure.
• Students learned to identify the antheridium in their biology lab.