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-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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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. 2022
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