discina

from WordNet (r) 3.0 (2006)

discina
    n 1: any fungus of the genus Discina

from The Collaborative International Dictionary of English v.0.48

Discina \Dis*ci"na\, n. [NL., fr. L. discus disk, Gr. ?.]
   (Zool.)
   A genus of Branchiopoda, having a disklike shell, attached by
   one valve, which is perforated by the peduncle.
   [1913 Webster]