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Meaning of soredium

so•re•di•um

Pronunciation: (su-rē'dē-um), [key]
— pl. -di•a
  1. a group of algal cells surrounded by hyphal tissue, occurring on the surface of the thallus and functioning in vegetative reproduction. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.