- a quadrilateral plane figure having two parallel and two nonparallel sides.
- British.trapezium(def 1b).
Origin of trapezoid
Examples from the Web for trapezoidal
Historical Examples of trapezoidal
The area is trapezoidal; in other words, the sides vary in length.Vacation days in Greece
Rufus B. Richardson
A section across the middle of the implement would be trapezoidal with incurved sides.Throwing-sticks in the National Museum
Otis T. Mason
The labrum, or upper lip, is separated by a deep suture from the clypeus, and is trapezoidal in form.Our Common Insects
Alpheus Spring Packard
In channels of trapezoidal form the velocity increases and diminishes with the discharge.
They consisted of shutters stiffened with four trapezoidal trusses.ASCE 1193: The Water-Works and Sewerage of Monterrey, N. L., Mexico
George Robert Graham Conway
Word Origin for trapezoid
1706, "a trapezium," from Modern Latin trapezoides, from Late Greek trapezoeides (Proclus), special use by Euclid of Greek trapezoeides "trapezium-shaped," from trapeza, literally "table" (see trapezium), + -oeides "shaped" (see -oid). Technically, a quadrilateral figure with no two sides parallel. But in English since c.1800, often confused with trapezium in its sense of "a quadrilateral figure having only two sides parallel."
A four-sided polygon in which two sides are parallel and two are not.