Soredium

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Soredium \So*re"di*um\, n.; pl. {Soredia}. [NL., fr. Gr. ? a
     heap.] (Bot.)
     A patch of granular bodies on the surface of the thallus of
     lichens.
     [1913 Webster]