halometer

See also: halimeter

English

Etymology

halo- +‎ -meter

Noun

halometer (plural halometers)

  1. An instrument for measuring the forms and angles of salts and crystals.[1]
  2. An instrument for determining the size of blood cells by measuring the angular diameter of diffraction of light passing through the blood.
    • 1949, J. W. D. Megaw, The Indian Medical Gazette - Volume 84, page 312:
      When a small source of light is viewed through a thin blood film on a glass slide, a circular coloured pattern, or halo, is seen. The angular diameter of this halo is inversely proportional to the diameter of the blood cell and it is this which the halometer measures.

Synonyms

References
  1. “halometer”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.
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