isosceles

American  

[ahy-sos-uh-leez] / aɪˈsɒs əˌliz /

adjective

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

   an isosceles triangle; an isosceles trapezoid.

---

isosceles British  

/ 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 Scientific  

/ ī-sŏs′ə-lēz′ /

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

---

Etymology

Origin of isosceles

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

Example Sentences

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

From Los Angeles Times • Apr. 4, 2024

Its shape can be approximated as an isosceles triangle with height 205 m and width 388 m.

From Textbooks • Mar. 30, 2016

Arby’s Potato Cakes are lusty little isosceles triangles of pure crunch.

From Washington Post • Apr. 22, 2015

In the late 16th century, peak beards – beards shaped like an isosceles triangle – had a moment.

From The Guardian • Aug. 27, 2014

My head is full of isosceles triangles and hypotenuses and formulas.

From "The Queen of Water" by Laura Resau