| 单词 | peri-hexahedral | 
| 释义 | > as lemmasperi-hexahedral  a.   Forming adjectives designating prisms derived from four-sided prisms by the development of secondary facets on their edges to give prisms the numbers of whose sides are indicated by the second element, as  peri-decahedral,  peri-dodecahedral,  peri-hexahedral,  peri-octahedral,  peri-polygonal. Obsolete. rare. ΚΠ 1817    R. Jameson Treat. External Characters Minerals 		(ed. 3)	 193  				Peri-hexahedral, peri-octahedral, peri-decahedral, and peri-dodecahedral, when the primitive four-sided prism is changed by means of decrements into a six, eight, ten or twelve sided prism. 1817    R. Jameson Treat. External Characters Minerals 		(ed. 3)	 202  				Peri-polygonal (F. peri-polygone), when the prism has a great number of lateral planes, such as the peri-polygonal tourmaline. < as lemmas  | 
	
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