solar-sail

solar sail

noun
Aerospace. a design concept for spacecraft propulsion consisting of a very thin, very large sheet of highly polished material that would be driven by the pressure of sunlight.

Origin:
1955–60

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
solar sail
 
n
a device that reflects light particles from the Sun, gaining momentum in the opposite direction to propel spacecraft forwards

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
solar sail  
A saillike device that is made of lightweight and highly reflective material and attached to a spacecraft to harness the radiation pressure of the solar wind and light for propulsion. Also called light sail.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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