nephoscope

[nef-uh-skohp]

noun

an instrument for determining the speed and direction of cloud motion.

Origin of nephoscope

First recorded in 1880–85; nepho- + -scope

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Examples from the Web for nephoscope

Historical Examples of nephoscope

Close by there was also a nephoscope for determining the motion of clouds.
The Home of the Blizzard
Douglas Mawson
To measure the motion of clouds the nephoscope (Fig. 1) is used.
Sounding the Ocean of Air
A. Lawrence Rotch
At many of the86 more important stations the movements of clouds are observed with a nephoscope.
Meteorology
Charles Fitzhugh Talman
The directions of movement of clouds are determined by means of the nephoscope.
Practical Exercises in Elementary Meteorology
Robert DeCourcy Ward
The nephoscope (Greek: cloud observer) is an instrument used in determining the directions of movement of clouds.
Practical Exercises in Elementary Meteorology
Robert DeCourcy Ward

British Dictionary definitions for nephoscope

nephoscope

noun

an instrument for measuring the altitude, velocity, and direction of movement of clouds

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012