| 单词 | semi-tangent | 
| 释义 | > as lemmassemi-tangent   semi-tangent  n.  Brit.  , U.S.  , ΘΚΠ the world > relative properties > number > geometry > line > 			[noun]		 > tangent touchline1551 adscript1636 tangent1655 focal tangent1706 semi-tangent1823 tractor1867 bitangent1873 slope1889 1823    J. Mitchell Dict. Math. & Physical Sci. at Projection  				Any arc EMF of a great circle is projected into the sum of its semi-tangents. < as lemmas  | 
	
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