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Meaning of hypothecium

hy•po•the•ci•um

Pronunciation: (hī"pu-thē'shē-um, -sē-um), [key]
— pl. -ci•a
  1. the layer of hyphal tissue directly beneath the hymenium of an apothecium.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.