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Etymology · Ancient Greek

περι-

5 English words descend from Ancient Greek περι-, most common first.

perihelionThe point in the elliptical orbit of a comet, planet, etc., where it is nearest to the Sun.
pericynthionThe point in an elliptical orbit around the moon that passes closest to the moon.
periegesisA description of an area or territory.
periegeteA writer of a periegesis.
perikymaAny of the pits around the long prisms of tooth enamel, indicating the places where enamel-producing cells used to make contact with neighbouring cells.