| deca- or dec- also deka- or dek- pref. Ten: decane. [Greek deka-, from deka, ten; see dek  in Indo-European roots.] |
deca-, deka- before a vowel, dec-, dek-
prefix
(Mathematics) denoting ten: decagon. In conjunction with scientific units the symbol da is used
[from Greek deka]
| deca- A prefix that means "ten," as in decahedron, a polygon having ten faces. |
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