trap ‧ e ‧ zoid /ˈtræpəzɔɪd, ˈtræpɪzɔɪd/ BrE AmE noun [countable] technical
[ Date: 1700-1800 ; Language: Modern Latin ; Origin: trapezoïdes , from Greek , 'trapezium-shaped' , from trapeza ; ⇨ ↑ trapezium ]
1 . British English a shape with four sides, none of which are parallel
2 . American English a shape with four sides, only two of which are parallel