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The Collaborative International Dictionary
Sporangium

Sporangium \Spo*ran"gi*um\ (sp[-o]*r[a^]n"j[i^]*[u^]m), n.; pl. Sporangia (sp[-o]*r[a^]n"j[i^]*[.a]). [NL., fr. Gr. ? a sowing, seed + ? a receptacle.] (Bot.) A spore case in the cryptogamous plants, as in ferns, etc.

Douglas Harper's Etymology Dictionary
sporangium

"a case containing spores," 1821, Modern Latin (plural sporangia), from Greek spora "spore" (see spore) + angeion "vessel" (see angio-).

Wiktionary
sporangium

n. (context botany mycology English) A case, capsule, or container in which spores are produced by an organism. (From 1821.)

WordNet
sporangium
  1. n. organ containing or producing spores [syn: spore case, spore sac]

  2. [also: sporangia (pl)]

Wikipedia
Sporangium

A sporangium (pl., sporangia) (modern Latin, from Greek σπόρος (sporos) ‘spore’ + αγγείον (angeion) ‘vessel’) is an enclosure in which spores are formed. It can be composed of a single cell or can be multicellular. All plants, fungi, and many other lineages form sporangia at some point in their life cycle. Sporangia can produce spores by mitosis, but in nearly all land plants and many fungi, sporangia are the site of meiosis and produce genetically distinct haploid spores.

Usage examples of "sporangium".

Prothallus bearing young sporophyte, with a single sporangium and adventitious roots!