First Known Use: 1570
Dictionary
equilateral
adjective equi·lat·er·al \ˌē-kwə-ˈla-tə-rəl, ˌe-, -ˈla-trəl\
Definition of EQUILATERAL
1
: having all sides equal <an equilateral triangle> <an equilateral polygon> — see triangle illustration
2
: having all the faces equal <an equilateral polyhedron>
See equilateral defined for kids
ADVERTISEMENT
Origin of EQUILATERAL
Late Latin aequilateralis, from Latin aequi- + later-, latus side — more at lateral
Other Mathematics and Statistics Terms
EQUILATERAL Defined for Kids
equilateral
adjective equi·lat·er·al \ˌē-kwə-ˈla-tə-rəl, ˌe-kwə-\
Definition of EQUILATERAL for Kids
: having all sides or faces equal <an equilateral triangle>
Learn More About EQUILATERAL
Browse
Next Word in the Dictionary: equilateral archPrevious Word in the Dictionary: equilaterAll Words Near: equilateral
ADVERTISEMENT
Seen & Heard
What made you want to look up equilateral? Please tell us where you read or heard it (including the quote, if possible).