biquartzn.
/ˈbʌɪkwɔːts/ Optics.
A double quartz plate used for detecting polarization.
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the world > physical sensation > sight and vision > optical instruments > instruments to refract, etc., light > [noun] > polariscope > parts of
tourmaline1816
analyser1833
polarizer1837
biquartz1878
biplate1890
1878 J. N. Lockyer Stargazing 452 There is also another instrument for detecting polarization which is perhaps more commonly used than the biquartz.
1884 A. Daniell Text-bk. Princ. Physics 510 A double-quartz plate, or Biquartz.
1890 T. Preston Theory of Light 373 The biquartz..consists of two semicircular plates of quartz placed in juxtaposition.
1911 Encycl. Brit. XXI. 938/1 The chief features of Soleil's saccharimeter are the biquartz and the compensator.
This entry has not yet been fully updated (first published 1933; most recently modified version published online March 2018).
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n.1878