A stone formed in the salivary gland WordNet 3.0 & Open English WordNet

Sialolithiasis is a crystallopathy where a calcified mass or sialolith forms within a salivary gland, usually in the duct of the submandibular gland. Wikipedia

Medical condition Wikidata

Technically, a calculus in the salivary ducts causing an obstruction. There are others obstructions of the salivary ducts that may also be referred to as sialoliths, including infectious blockage, stenosis, etc. There are also other substances besides calcium that may be the cause of the obstruction. Wiktionary

A condition where a calcified mass forms within a salivary gland. Wiktionary