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photographic emulsion
photographic equipment
photographic film
photographic material
photographic paper
photographic plate
photographic print
Photographic printing
Photographic telescope
photographically
Photographist
Photographometer
Photographone
Photography
Photogravure
Photoheliograph
-- Photoheliometer --
photojournalism
photojournalist
Photolithograph
Photolithographer
Photolithographic
Photolithography
Photologic
Photologist
Photology
Photoluminescence
Photoluminescent
Photomagnetic
Photomagnetism
Photomechanical
photomechanics
Photometer
Photoheliometer
Pho`to`he`li`om´e`ter
n.
1.
(Astron.)
A
double-lens
instrument
for
measuring
slight
variations
of
the
sun
'
s
diameter
by
photography
,
utilizing
the
common
chord
of
two
overlapping
images
.
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