Ultraviolet
Definition of Ultraviolet
Ul`tra`vi´o`let
a.
1.
(Physics)
Lying
outside
the
visible
spectrum
at
its
blue-violet
end
; -
said
of
light
more
refrangible
(
i
.
e
.
having
a
shorter
wavelength
)
than
the
extreme
violet
rays
of
the
visible
spectrum
.
Electromagnetic
radiation
with
wavelengths
shorter
than
those
of
ultrviolet
light
are
not
usually
considered
as
light
waves
,
but
are
classified
differently
.
The
ultraviolet
region
of
the
electromagnetic
spectrum
is
generally
considered
as
comprising
those
electromagnetic
emissions
with
wavelengths
lying
between
those
of
visible
light
and
those
of
X-rays
,
i
.
e
.
between
4000
Angstroms
and
100
Angstroms
.
Related Words
invisible
,
unseeable
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Ultra-
Ultragaseous
Ultrage
Ultraism
Ultraist
Ultramarine
Ultramarine ash
Ultramontane
Ultramontanism
Ultramontanist
Ultramundane
Ultrared
Ultratropical
-Ultraviolet-
Ultrazodiacal
Ultroneous
Ulula
Ululant
Ululate
Ululation
Ulva
Umbe
Umbecast
Umbel
Umbellar
Umbellate
Umbellet
Umbellic
Umbellic acid
Umbellifer
Umbelliferone
Umbelliferous
Umbellularia
Umbellule
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B
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E
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H
I
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