Meaning of sorus

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.
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