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thecium

[thee-shee-uh m, -see-uh m]
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noun, plural the·ci·a [thee-shee-uh, -see-uh] /ˈθi ʃi ə, -si ə/. Mycology.
  1. hymenium.

Origin of thecium

1880–85; < New Latin < Greek thēkíon, diminutive of thḗkē theca; see -ium
Related formsthe·ci·al, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018