From Biology-Online Dictionary | Biology-Online Dictionary


1. (Science: geometry) A plane figure having four angles, and consequently four sides; any figure having four angles.

2. A square or quadrangular space or inclosure, such a space or court surrounded by buildings, especially. Such a court in a college or public school in England.

Origin: F, fr. L. Quadrangulum; quattuor four _ angulus an angle. See Four, and Angle a corner.