lumetern.
/ˈl(j)uːmiːtə/ = luxmeter n.
ΘΚΠ
the world > matter > light > illumination > [noun] > instrument for measuring
luxmeter1910
lumeter1911
the world > matter > physics > electromagnetic radiation > light > intensity of light, luminosity > [noun] > degree of intensity > instrument
photometer1779
photoscope1872
spectrophotometer1881
light meter1889
Hefner1891
illuminometer1895
luxmeter1910
lumeter1911
telephotometer1915
1911 Trans. Optical Soc. 12 104 Messrs. R. & J. Beck, Ltd., the makers of the ‘Lumeter’ instrument.
1923 L. C. Martin Colour 178 The lumeter reads in foot-candles, that is to say the brightness which a perfectly reflecting and diffusing surface would have if illuminated by so many foot-candles.
1947 Brit. Jrnl. Psychol. 38 89 The apparatus was calibrated for intensity of illumination (as this would appear to the subject's eye) by placing a lumeter in the position of the tube T.
This entry has not yet been fully updated (first published 1976; most recently modified version published online March 2018).
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n.1911- cell lethality
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- cell membrane
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- cell number
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