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cystidium

[si-stid-ee-uh m]
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noun, plural cys·tid·i·a [si-stid-ee-uh] /sɪˈstɪd i ə/. Mycology.
  1. (in certain basidiomycetous fungi) one of the large, inflated, sterile cells growing between the basidia and usually projecting beyond them.
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Origin of cystidium

From New Latin, dating back to 1855–60; see origin at cyst-, -idium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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