the world > health and disease > ill health > a disease > disorders of internal organs > disorders of mouth > [noun] > impure matter (2)
The process of becoming furred or encrusted; the state of being furred; also, a coating of fur.
Impure matter collecting about the teeth, gums, etc.; spec. in Pathology, the foul crusts formed upon the teeth and lips in typhoid or other fevers.