parallel lines; two straight lines in the same plane that never intersect

leaf veins that run side-by-side from the base to the tip without intersecting, as seen in many monocot plants

a six-sided three-dimensional shape where every pair of opposite faces is parallel; includes shapes like rectangular prisms and rhomboids

a four-sided shape where the opposite sides are parallel and equal in length

parallel universe; a concept in science fiction or physics describing a separate world that exists alongside our own

A type of computation in which many calculations or the execution of processes are carried out simultaneously.

The import of genuine branded goods into a country by someone other than the authorized agent, such as by an independent trader; gray-market goods.

two or more types of work or tasks carried out at the same time through mutual coordination

the parallel postulate in geometry; Euclid's fifth postulate