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Webster 1913 Edition

Equilateral

Eˊqui-lat′er-al

,
Adj.
[L.
aequilateralis
;
aequus
equal +
latus
,
lateris
, side: cf. F.
équilatéral
.]
Having all the sides equal;
as, an
equilateral
triangle; an
equilateral
polygon.
Equilateral hyperbola
(Geom.)
,
one whose axes are equal.
–
Equilateral shell
(Zoöl.)
,
one in which a transverse line drawn through the apex of the umbo bisects the valve, or divides it into two equal and symmetrical parts.
–
Mutually equilateral
,
applied to two figures, when every side of the one has its equal among the sides of the other.

Eˊqui-lat′er-al

,
Noun.
A side exactly corresponding, or equal, to others; also, a figure of equal sides.

Webster 1828 Edition

Equilateral

EQUILAT'ERAL

,
Adj.
[L. oequus, equal, and lateralis, from latus, side.]
Having all the sides equal; as an equilateral triangle. A square must necessarily be equilateral.

EQUILAT'ERAL

,
Noun.
A side exactly corresponding to others.

Definition 2024

equilateral

equilateral

See also: équilatéral

English

Alternative forms

Adjective

equilateral ‎(not comparable)

  1. (geometry) Referring to a polygon all of whose sides are of equal length. Not necessarily a regular polygon since the angles can still differ (a regular polygon would also be equiangular).

Translations

Noun

equilateral ‎(plural equilaterals)

  1. An equilateral triangle

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