sorus: Meaning and Definition of

so•rus

Pronunciation: (sôr'us, sōr'-), [key]
— pl. so•ri
  1. one of the clusters of sporangia on the back of the fronds of ferns. See diag. under
  2. a soruslike spore mass of certain fungi and lichens.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also: