I. noun Etymology: Latin quadrilaterus four-sided, from quadri- + later-, latus side Date: 1650 a polygon of four sides, II. adjective Date: 1656 having four sides
QUADRILATERAL
Meaning of QUADRILATERAL in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012