Wiktionary
radiopaque
a. impenetrable to X-rays and other radiation
WordNet
radiopaque
adj. not transparent to X-rays or other forms of radiation; "barium sulfate is radiopaque" [syn: radio-opaque] [ant: radiolucent]
Usage examples of "radiopaque".
We have a monoclonal antibody containing a radiopaque heavy metal devised by a contributing radiologist.