trapezium

• اسم له معنيان مختلفان: في الهندسة، شكل رباعي لا أضلاع متوازية فيه؛ وفي التشريح، عظمة من عظام الرسغ تقع في جهة الإبهام وتتصل بعظمتي المشط الأولى والثانية.

A noun with two distinct meanings: in geometry, it refers to a quadrilateral with no parallel sides; in anatomy, it refers to a wrist bone on the thumb side that articulates with the first and second metacarpals.

1. Quadrilateral shapeB2formalbritish

   A four-sided geometric figure with no parallel sides.

   شكل رباعي

   • The children learned to draw a trapezium in geometry class.
   • A trapezium has four sides, but none of them are parallel.
   • The shape of the field was an irregular trapezium.

   المرادفاتtrapezoid

2. Wrist boneC1formalmedical

   A small bone in the wrist, located on the thumb side, that connects with the first and second metacarpal bones.

   العظم المربعي

   • The trapezium bone is essential for thumb movement.
   • A fracture of the trapezium can cause difficulty gripping objects.
   • The surgeon examined the trapezium for signs of arthritis.