D defs.my
Entry 1 sense Webster, 1913

Ascus

· As·cus · IPA /ˈæskəs/
01 n. A small membranous bladder or tube in which are inclosed the seedlike reproductive particles or sporules of lichens and certain fungi.
  1. 1.
    A small membranous bladder or tube in which are inclosed the seedlike reproductive particles or sporules of lichens and certain fungi.(Bot.)