(anatomy, dentistry) A bony substance that covers the root of a tooth; cement.

A rechargeable battery

A cell, found in females, which merges with a sperm cell to form a zygote.

(computing theory) An automaton consisting of cells arranged in a regular grid, in one or more dimensions. Each application of an associated rule creates a new generation, where the cells have a new configuration of values.

(astronomy) The dynamics of celestial bodies subject to mutual gravitational attraction.

A polyhedral cell in the epidermis having many spines that form intercellular bridges.

(anatomy) Any of the cylindrical photoreceptor cells in the retina that function in dim light levels.

Alternative form of cell phone

(anatomy) Any of the photoreceptor cells in the retina that are responsible for colour vision in relatively bright light.

The location above the surface of the Earth where the lowest layer of clouds are reported as broken, overcast or obscuration (as opposed to thin or partial).