Definition of ascus in English:

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Pronunciation: /ˈaskəs/

noun (plural asci /ˈaskʌɪ/ /ˈaskiː/)

A sac, typically cylindrical in shape, in which the spores of ascomycete fungi develop.
Example sentences
  • Hymenium - the spore-bearing layer of a fruiting body, containing asci, spores and paraphyses.
  • Spores were liberated from asci, and vegetative cells were killed, by treatment with glusulase and ethanol.
  • When mature, a perithecium contains several hundred asci that are ejected by turgor pressure.


Mid 19th century: modern Latin, from Greek askos 'bag'.

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