salt cellar / (historical) A small dish for holding salt.

(US) a domestic underground shelter used as protection from severe winds

(astronomy) An abstract sphere of infinite radius which serves as the imaginary backdrop for celestial objects, and of which the visible sky is one hemisphere.

(immunology) A form of B cell that produces antibodies after having reacted with its specific antigen in follicle centers.

A cell that forms four megaspores by meiosis; a megasporocyte.

(music) A musical instrument consisting principally of a set of graduated steel plates struck with hammers that are activated by a keyboard.

Any of a variety of thermoplastics created from nitrocellulose and camphor, once used as photographic film. / (figuratively, often used attributively) The genre of cinema; film.

Any of a variety of transparent plastic films, especially one made of processed cellulose.

(transitive) To wrap or package in cellophane.

(oncology) A giant lymphocyte characteristic of Hodgkin's lymphoma.