Definition of Pantopaque in US English:

Pantopaque

noun

Radiology
  • The radiological contrast medium iophendylate. [A trademark in the United Kingdom.]

Origin

1940s; earliest use found in The Official Gazette. From pant- (in panto-) + opaque, after radiopaque.

Pronunciation

Pantopaque

/ˈpantə(ʊ)peɪk/