1852 Dana Crust. ii. 698Abdomen..broad truncato-rotund at apex. 
1891 Cent. Dict. ,Truncatosinuate, in entom., truncate, with a sinus or slight inward curve on the edge of the truncation. 
| 词汇 | truncato- | 
| 词根词缀 | OED 
 
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