The Collaborative International Dictionary
Xanthoprotein
Xanthoprotein \Xan`tho*pro"te*in\, n. [Xantho- + protein.] (Physiol. Chem.) A yellow acid substance formed by the action of hot nitric acid on albuminous or proteid matter. It is changed to a deep orange-yellow color by the addition of ammonia.
Wiktionary
xanthoprotein
n. A protein formed when xanthoproteic acid contacts epithelial cells, indicative of inadequate safety precautions when handling nitric acid.