1. a combining form meaning “ten,” used in the formation of compound words: decapod.


  1. denoting ten: decagon . In conjunction with scientific units the symbol da is used

before a vowel, dec-, word-forming element meaning “ten,” from Latinized comb. form of Greek deka “ten” (see ten). In the metric system, “multiplied by ten;” while deci- means “divided by ten.”


  1. Ten:decane.

  1. A prefix that means “ten,” as in decahedron, a polygon having ten faces.

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