| 单词 | trephine opening | 
| 释义 | > as lemmastrephine opening  b.  attributive, as  trephine hole,  trephine opening,  trephine saw (cf. trepan n.1 Compounds). Π 1876    T. Bryant Pract. Surg. 		(ed. 2)	 I. vi. 218  				The trephine opening was filled in by a tough membrane. 1877    E. H. Knight Pract. Dict. Mech.  				Trephine-saw, a crown-saw; a cylindrical saw with a serrated end, to make a circular kerf by the rotation of the saw. 1891    W. H. White in  Jrnl. Physiol. 12 247  				The same sized trephine hole was made in the skull. < as lemmas  | 
	
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