-idium
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a diminutive suffix, corresponding to -idion, used in zoological, biological, botanical, anatomical, and chemical terms: peridium.
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QUIZ YOURSELF ON “ITS” VS. “IT’S”!
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On the farm, the feed for chicks is significantly different from the roosters’; ______ not even comparable.
Origin of -idium
<Latin <Greek -idion-idion
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021