(nautical) Navigation by using the positions of the stars and other heavenly bodies.

US spelling of coeliac disease

(US, anatomy) Of, pertaining to or located within the abdomen or abdominal cavity. / (US, medicine) Of or pertaining to celiac disease.

Someone who has celiac disease.

A resident cell of connective tissue that contains many granules rich in histamine and heparin.

(anatomy) A kind of sustentacular cell which serves as a "nurse" cell of the testes and which is part of a seminiferous tubule.

plural of cell wall

Proto-Celtic language.

The putative ancestor of all the known Celtic languages.

(US, idiomatic) Downstairs; the opposite of upstairs.