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roentgenopaque

American  
[rent-guh-noh-peyk, -juh-, ruhnt-] / ˌrɛnt gə noʊˈpeɪk, -dʒə-, ˌrʌnt- /

adjective

  1. not permitting the passage of x-rays.

roentgenopaque British  
/ -tjən-, ˌrɒntɡənəʊˈpeɪk, ˌrɛnt- /

adjective

  1. (of a material) not allowing the transmission of X-rays

"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

Etymology

Origin of roentgenopaque

roentgen(o)- + opaque

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.