This shows grade level based on the word's complexity.
thulium
[ thoo-lee-uhm ]
/ ˈθu li əm /
Save This Word!
This shows grade level based on the word's complexity.
noun Chemistry.
a rare-earth metallic element found in the minerals euxenite, gadolinite, etc.Symbol: Tm; atomic weight: 168.934; atomic number: 69; specific gravity: 9.32.
QUIZ
THINGAMABOB OR THINGUMMY: CAN YOU DISTINGUISH BETWEEN THE US AND UK TERMS IN THIS QUIZ?
Do you know the difference between everyday US and UK terminology? Test yourself with this quiz on words that differ across the Atlantic.
Question 1 of 7
In the UK, COTTON CANDY is more commonly known as…
Words nearby thulium
thug, thuggee, thuja, Thule, thulia, thulium, thumb, thumb a ride, thumb drive, thumber, thumb glass
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
British Dictionary definitions for thulium
thulium
/ (ˈθjuːlɪəm) /
noun
a malleable ductile silvery-grey element occurring principally in monazite. The radioisotope thulium-170 is used as an electron source in portable X-ray units. Symbol: Tm; atomic no: 69; atomic wt: 168.93421; valency: 3; relative density: 9.321; melting pt: 1545°C; boiling pt: 1950°C
Word Origin for thulium
C19: New Latin, from Thule + -ium
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 thulium
thulium
[ thōō′lē-əm ]
Tm
A soft, silver-gray metallic element of the lanthanide series. One of its artificial radioactive isotopes is used as a radiation source in small, portable x-ray machines. Atomic number 69; atomic weight 168.934; melting point 1,545°C; boiling point 1,727°C; specific gravity 9.3; valence 2, 3. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.