Williams refractometer

Williams refractometer

[′wil·yəmz ‚rē‚frak‚täm·əd·ər]
(optics)
A refractometer in which light from a single slit is divided into two beams by a pentagonal prism.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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