Ascus

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  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.
     [1913 Webster]



From WordNet (r) 2.0 [wn]:

  ascus
       n : saclike structure in which ascospores are formed through
           sexual reproduction of ascomycetes
       [also: {asci} (pl)]