Quadrilateral



[kwod-ruh-lat-er-uh l] /ˌkwɒd rəˈlæt ər əl/

adjective
1.
having four sides.
noun
2.
a plane figure having four sides and four angles.
3.
something of this form.
4.
Geometry.

5.
the space enclosed between and defended by four fortresses.
/ˌkwɒdrɪˈlætərəl/
adjective
1.
having or formed by four sides
noun
2.
Also called tetragon. a polygon having four sides. A complete quadrilateral consists of four lines and their six points of intersection
n.

“four-sided,” 1640s, with -al (1) + Latin quadrilaterus, from quadri- “four” (see quadri-) + latus (genitive lateris) “side” (see oblate (n.)). As an adjective from 1650s. Related: Quadrilaterally.
quadrilateral
(kwŏd’rə-lāt’ər-əl)
A polygon that has four sides, such as a rectangle or rhombus.

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