noun, plural meg·a·spo·ran·gi·a [meg-uh-spaw-ran-jee-uh, -spoh-] /ˌmɛg ə spɔˈræn dʒi ə, -spoʊ-/. Botany.
- a sporangium containing megaspores.
noun plural -gia (-dʒɪə)
- the structure in certain spore-bearing plants in which the megaspores are formed: corresponds to the ovule in seed plantsCompare microsporangium
- A plant structure in which megaspores are formed, such as those of the female cones of pines.