sorus Meaning, Definition & Usage

  1. noun a spore-producing structure in certain lichens and fungi
  2. noun cluster of sporangia usually on underside of a fern frond

WordNet

So"rus noun
Etymology
NL., fr. Gr. a heap.
Wordforms
plural Sori
Definitions
  1. (Bot.) One of the fruit dots, or small clusters of sporangia, on the back of the fronds of ferns.

Webster 1913