mesopicadj.
/mɛˈsɒpɪk/, /mᵻˈsɒpɪk/, U.S. /məˈzɑpɪk/; see also meso- comb. form. 1. Physical Anthropology. Designating or having a head with a moderately projecting profile. Now rare.
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the world > life > the body > external parts of body > head > types of head > [adjective]
mesopic1885
the world > life > the body > external parts of body > head > types of head > [adjective] > having
headedOE
cop-headed1519
small-headedc1540
jolt-headed1552
chuff-headed1563
ass-headed1584
two-headed1596
golden-headed1598
hard-headed1601
big-headed1614
bicipitous1646
buffle-headed1654
female-headed1655
heavy-headed1684
bullet-headed1699
jolter-headed1748
pinheaded1771
pigheaded1774
thin-headed1804
roundhead1842
bulbous-headed1860
blob-headed1865
occipital1873
fat-headed1883
mesopic1885
peanut-headed1906
dome-headed1910
1885 O. Thomas in Jrnl. Anthropol. Inst. 14 334 Individual skulls or races having indices above 107.5 might be called platyopic or flat-faced; from 107.5 to 110.0, mesopic.
1904 Jrnl. Anthropol. Inst. 34 238 The face is mesopic and leptoprosopic, but has a broad appearance owing to the fulness of the malars.
2. Physiology. Of, relating to, or designating vision in moderate levels of light (intermediate between scotopic and photopic).
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1949 Jrnl. Optical Soc. Amer. 39 279/1 It is necessary to choose arbitrarily a light source of specified spectral composition as a standard for the specification of the luminance scale through the mesopic and scotopic regions.
1976 Nature 12 Aug. 601/2 Tables have been published of averaged brightness matches made by 16 observers who had compared 11 spectral lights..with the CIE standard radiator in a 15° field set at various levels in the mesopic range.
1995 Vision Res. 35 1483 Dyslexics have been found to have reduced luminance contrast sensitivity at mesopic luminance levels.
This entry has been updated (OED Third Edition, September 2001; most recently modified version published online March 2022).
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adj.1885