equilux - Wiktionary, the free dictionary
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English
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Etymology
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From
equi-
+
Latin
lux
(
“
light
”
)
.
Noun
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equilux
(
plural
equiluxes
)
An
isophot
.
A day in which the
durations
of
light
and
darkness
are
equal
, contrasted with an
equinox
, where they may differ slightly due to the angular diameter of the sun and atmospheric refraction.