Filthy, useless, or rejected deposits of any kind, specifically in medicine: Sordes can be described as the foul matter that collects on the teeth and tongue and consists of food, microorganisms, and epithelial elements.

Sordes can occur in low fevers and other conditions attended with great vital depression.

Sordes can be a dark brown or blackish crust-like collection on the lips, teeth, and gums of a person with dehydration associated with a chronic debilitating disease.

Foul material accumulating in the stomach: Sordes gastrica consists of a mixture of food, epithelial matter (membranous tissue covering internal organs and other internal surfaces of the body), and microorganisms.