Oosporangiums

Oosporangium O`["o]*spo*ran"gi*um, n.; pl. L. {O["o]sporangia}, E. {O["o]sporangiums}. [NL., fr. Gr. w,'o`n an egg + ? vessel.] (Bot.) An o["o]gonium; also, a case containing oval or rounded spores of some other kind than o["o]spores. [1913 Webster]