pentadeca-
combining form 
or pentadec-
Etymology: Latin Greek pentedeka-, from Greek pentekaideka, literally, five and ten, from penta- + kai and + deka ten — more at ten 
 : fifteen 
< pentadecahydrate >
or pentadec-
< pentadecahydrate >
| 词汇 | pentadeca- | 
| 词根词缀 | Webster pentadeca- or pentadec- < pentadecahydrate > | 
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