tetrasporangium

/ˌtɛtrəspəˈrændʒiəm/
noun
  1. A structure in certain algae and fungi that produces four spores (tetraspores).
    • Under the microscope, the tetrasporangium appeared as a small round sac.
    • The biologist identified the tetrasporangium in the red algae sample.
    • Each tetrasporangium releases four spores when mature.