| the broad, upper portion of either hipbone. |
| (in humans) either of two slender bones, each articulating with the sternum and a scapula and forming the anterior part of a shoulder; collarbone. |
trapezoid trap·e·zoid (trāp'ĭ-zoid')
n.
A quadrilateral having two parallel sides.
A small bone in the wrist situated near the base of the index finger and articulating with the second metacarpal, trapezium, capitate, and scaphoid bones.
| trapezoid (trāp'ĭ-zoid') Pronunciation Key
A four-sided plane figure having two parallel sides. |
A four-sided polygon in which two sides are parallel and two are not.