英和和英

語源

From equi- +‎ lateral.

発音

• 韻: -ætəɹəl

形容詞

equilateral (not comparable)

1. (geometry, of a polygon) Having all the sides equal.
   • 2025 April 12, Edward Luce, “The revenge of geopolitics”, in FT Weekend (Life & Arts section), London: The Financial Times Ltd., →ISSN, →OCLC, page 2:

     Kissinger had wanted to keep an “equilateral” distance between the US, USSR and China. Under Carter, they became de facto partners.

2. (geometry, of a polyhedron) Having all the faces equal.
3. (zoology) Having the two sides equal, as a surface divisible by a longitudinal median line into two halves of the same form.
4. (zoology) Having all the convolutions of the shell in one plane, chiefly of foraminifers.

派生語

名詞

equilateral (plural equilaterals)

1. A side exactly corresponding, or equal, to others.
2. A figure having all its sides equal.