antheridium
/ˌænθəˈrɪdiəm/
noun
- The male reproductive organ in certain plants like ferns, mosses, and algae, which produces sperm cells.
- Under the microscope, the antheridium appeared as a small, round sac filled with swimming sperm.
- In mosses, the antheridium is usually found at the tip of the plant.
- The biologist explained how the antheridium releases sperm that swim through water to fertilize the egg.