Spore case

• Fungal spore sac
• Sac in which seed spores grow
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• Spore sac

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Ascus \As"cus\, n.; pl. Asci. [NL., fr. Gr. ? a bladder.] (Bot.) A small membranous bladder or tube in which are inclosed the seedlike reproductive particles or sporules of lichens and certain fungi.

Wikipedia Word definitions in Wikipedia
An ascus (plural asci ; from Greek ἀσκός ảskós ' skin bag') is the sexual spore-bearing cell produced in ascomycete fungi . Asci usually contain eight ascospores , produced by meiosis followed, in most species, by a mitotic cell division. However, asci ...

Wiktionary Word definitions in Wiktionary
n. A sac-shaped cell present in ascomycete fungi; it is a reproductive cell in which meiosis and an additional cell division produce eight spores.

WordNet Word definitions in WordNet
n. saclike structure in which ascospores are formed through sexual reproduction of ascomycetes [also: asci (pl)]

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
"sac in certain fungi," 1830, Modern Latin, from Greek askos "leather bag, wine skin," which is of unknown origin.