ostrac-
combining form 
or ostraco-
Etymology: New Latin, from Greek ostrak-, ostrako-, from ostrakon 
 : shell 
< Ostracoidea >
< Ostracophori >
or ostraco-
< Ostracoidea >
< Ostracophori >
| 词汇 | ostrac- | 
| 词根词缀 | Webster ostrac- or ostraco- < Ostracoidea > < Ostracophori > | 
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