trapezoid

• 有两条平行边的四边形；也指腕骨中位于大多角骨和头状骨之间的那块骨头。

A quadrilateral with two parallel sides, or a wrist bone located between the trapezium and the capitate bones.

1. Quadrilateral with two parallel sidesB2formal

   A four-sided shape (quadrilateral) that has exactly one pair of parallel sides.

   梯形

   • The math teacher drew a trapezoid on the board.
   • To find the area of a trapezoid, you need the lengths of both parallel sides and the height.
   • The shape of the table was an irregular trapezoid.

   同义词trapezium

2. Wrist boneC2formalmedical

   A small carpal bone in the human wrist, located between the trapezium and the capitate bones.

   小多角骨

   • The trapezoid bone is one of the eight carpal bones in the wrist.
   • A fracture of the trapezoid bone is rare but can occur from a fall.
   • The surgeon identified an injury to the trapezoid during the examination.

   同义词trapezoid bone