Quadrilateral with two parallel sides in the UK, and none in the US and Canada (9)

I believe the answer is:

trapezium

(Other definitions for trapezium that I've seen before include "Quadrilateral with pairs of unequal parallel sides" , "Carpal bone" , "Quadrilateral - small wrist bone" , "Type of quadrilateral" , "Quadrilateral with two parallel sides of unequal length" .)

I've seen this clue in The Sunday Times and The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.