Medical Definition of quadrilateral
: having four sides <a quadrilateral muscle>
Learn More about quadrilateral
Dictionary: Definition of "quadrilateral" Spanish Central: Translation of "quadrilateral" Nglish: Translation of "quadrilateral" for Spanish speakers Britannica English: Translation of "quadrilateral" for Arabic speakers Britannica.com: Encyclopedia article about "quadrilateral"
Seen and Heard
What made you want to look up quadrilateral? Please tell us where you read or heard it (including the quote, if possible).