tophus

English Thesaurus

1. an incrustation that forms on the teeth and gums (noun.object)

hypernym	:	crust, encrustation, incrustation,
definition	:	a hard outer layer that covers something (noun.object)

2. a deposit of urates around a joint or in the external ear; diagnostic of advanced or chronic gout (noun.substance)

hypernym	:	urate,
definition	:	a salt of uric acid (noun.substance)