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Dobsonian telescope

American  
[dob-soh-nee-uhn] / dɒbˈsoʊ ni ən /

noun

  1. a relatively inexpensive Newtonian telescope, suitable for visual but not photographic use, in which the tube assembly slips freely in the lower base.

Etymology

Origin of Dobsonian telescope

After John Dobson, U.S. astronomer, its inventor; -ian

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.