Thorotrast

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A radiographic contrast medium composed of a suspension of thorium dioxide. uncountable

Etymology

Blend of thorium + contrast. Originally a trade name.

Related phrases

contrast mediumthorium dioxide

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.