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单词 biaxial
释义

biaxialadj.

/bʌɪˈaksɪəl/
Etymology: < bi- comb. form 1a + axial adj.
1. Having two (optic) axes.
ΘΚΠ
the world > matter > chemistry > crystallography (general) > crystal (general) > crystal symmetry > [noun] > axis of symmetry > having two
biaxal1837
biaxial1858
1858 J. Hogg Microscope (ed. 3) i. iii. 156 Topaz.—A biaxial crystal.
c1865 J. Wylde Circle of Sci. I. 84/1 Nitre..is..a biaxial crystal.
2. Geometry. (See quot. 1889.)
ΘΚΠ
the world > relative properties > number > geometry > geometric space > [adjective] > having specific axes
biaxial1889
triaxal1891
coaxial1904
triaxial1924
1889 A. Cayley Coll. Math. Papers (1897) XIII. 13 Each conic meets each axis in two points; and at each of these points the axis and the tangent to the conic form with the lines to I, J a harmonic pencil. The binodal quartic is in this case said to be biaxial.
This entry has not yet been fully updated (first published 1887; most recently modified version published online June 2018).
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adj.1858
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