thallous

[ thal-uh s ]
/ ˈθæl əs /

adjective Chemistry.

containing univalent thallium.
Also thal·li·ous [thal-ee-uh s] /ˈθæl i əs/.

Origin of thallous

First recorded in 1885–90; thall(ium) + -ous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for thallous

thallous

/ (ˈθæləs) /

adjective

of or containing thallium, esp in the monovalent state
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