Tombaugh
[ tom-baw ]
/ ˈtɒm bɔ /
Save This Word!
noun
Clyde William, 1906–97, U.S. astronomer: discovered Pluto 1930.
QUIZ
CAN YOU ANSWER THESE COMMON GRAMMAR DEBATES?
There are grammar debates that never die; and the ones highlighted in the questions in this quiz are sure to rile everyone up once again. Do you know how to answer the questions that cause some of the greatest grammar debates?
Question 1 of 7
Which sentence is correct?
Words nearby Tombaugh
tomato hornworm, tomb, Tomba, tombac, Tombalbaye, Tombaugh, tombé, Tombigbee, tombola, tombolo, Tombouctou
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use Tombaugh in a sentence
Tombaugh was referring to a ninth planet that had been predicted to orbit the sun beyond Neptune.
British Dictionary definitions for Tombaugh
Tombaugh
/ (ˈtɒmbəʊ) /
noun
Clyde William. 1906–97, US astronomer, who discovered (1930) the dwarf planet Pluto
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
Scientific definitions for Tombaugh
Tombaugh
[ tŏm′bô′ ]
American astronomer who discovered Pluto in 1930. Beyond the orbit of Neptune, the existence of a planet known as Planet X, had been predicted some years earlier by the American astronomer Percival Lowell based on apparent perturbations in the orbits of Neptune and Uranus. Tombaugh's careful analysis of celestial photographs did reveal a new celestial body, although it was too small to have caused the perturbations. Planet X itself was never found.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.