Alternative form of preplanetary

(nautical) A diagram showing the number, possible arrangements, and sizes of the sails for a sailing vessel

plural of player piano

(crystallography) A plane of molecular weakness that allows movement without fracture.

The most common species of zebra, Equus quagga (formerly Equus burchellii)

(astronomy) A theoretical type of terrestrial planet that could form, if protoplanetary discs are carbon-rich and oxygen-poor.

A carbon planet.

(soccer, rugby) A kick in which the ball is placed, at rest, on the ground or on a small tee

Civilian clothes worn by someone in an occupation or organization for which a uniform might be expected, as the police or clergy.

alternative spelling of plain clothes when used attributively. / alternative form of plainclothes (adjective)