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Definitions of quadrilateral
  1. noun
    a four-sided polygon

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  2. adjective
    having four sides
Definition that contains quadrilateral
  • crow a small quadrilateral constellation in the southern hemisphere near Virgo
  • gaff a spar rising aft from a mast to support the head of a quadrilateral fore-and-aft sail
  • trapezoid a quadrilateral with two parallel sides
  • corvus a small quadrilateral constellation in the southern hemisphere near Virgo
  • parallelogram a quadrilateral whose opposite sides are both parallel and equal in length
  • trapezium a quadrilateral with no parallel sides
  • serratus posterior inferior a thin quadrilateral muscle at the junction of the thoracic and lumbar regions; acts to counteract the pull of the diaphragm on the ribs to which it is attached
  • tetragonal of or relating to or shaped like a quadrilateral
  • equal-area projection a map projection in which quadrilaterals formed by meridians and parallels have an area on the map proportional to their area on the globe
  • serratus posterior superior a thin quadrilateral muscle of the upper and dorsal part of the thorax; acts to elevate the upper ribs
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