isosceles

[ ahy-sos-uh-leez ]

adjective

1. (of a straight-sided plane figure) having two sides equal:

   an isosceles triangle; an isosceles trapezoid.

isosceles

/ aɪˈsɒsɪˌliːz /

adjective

1. (of a triangle) having two sides of equal length
2. (of a trapezium) having the two nonparallel sides of equal length

isosceles

/ ī-sŏs′ə-lēz′ /

1. Of or relating to a geometric figure having at least two sides of equal length.

Word History and Origins

Origin of isosceles¹

1545–55; < Late Latin < Greek isoskelḗs with equal legs, equivalent to iso- iso- + skél ( os ) leg + -ēs adj. suffix

Word History and Origins

Origin of isosceles¹

C16: from Late Latin, from Greek isoskelēs, from iso- + skelos leg

Example Sentences

A sort of isosceles triangle is formed, which will eventually collapse.

From Los Angeles Times

You scan each row and see several options that could fit the bill — craggy hunks labeled "Parmigiano Reggiano," neat isosceles triangles that read "Parmesan," and a whole host of pre-grated tubs sporting either one name or the other.

From Salon

The knifelike triangle coming down from the top baseline of the “M” graphic is reminiscent of the red triangle in El Lissitzky’s 1919 Soviet propaganda poster “Beat the Whites With the Red Wedge,” a lithograph of a sharp red isosceles symbolizing the Bolsheviks of the 1917 Russian Revolution, piercing a white circle symbolizing the anti-communist party.

From Los Angeles Times

The server stops by to shout about whether I’m enjoying my wine, a glass of Justin Isosceles, a red blend from California that she’s recommended to go with the filet.

From Seattle Times

Downstairs, the convivial dining room features well-loved, golden-toned reclaimed wood and walls of windows, with a sinuous bar and busy open kitchen on one end anchoring the airiness to warmth, the base of the space’s isosceles.

From Seattle Times