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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 e…

To balance two scales, sides, or ends; to keep even with equal weight on each side; to keep in equipoise. H. Spenser.

The state of being balanced; equality of weight. [R.] J. Gregory.

Equality of weight or force; an equipoise or a state of rest produced by the mutual counteraction of two or more forces.

Having equal moments of inertia.

Pertaining to an equinox, or the equinoxes, or to the time of equal day and night; as, the equinoctial line.

Equal as to number. [Obs.] Arbuthnot.

Equal-footed; having the pairs of feet equal.

To weigh equally; to esteem alike. [Obs.]

Equality of weight or force; hence, equilibrium; a state in which the two ends or sides of a thing are balanced, and hence equal; state of being equally balanced; -- said of moral, political, or social interests or forces. The means of preserving the equipoise and the tranquillity of the commonwealth. Burke. Our little…

Equality of power, force, signification, or application. Boyle.

Having equal power or force; equivalent. Bacon.

With equal power. Barrow.

Equality of weight; equipoise.

To be equal in weight; to weigh as much as another thing. Bp. Wilkins.

Having equal weight. Bailey.

Of equal weight on both sides; balanced. [Obs.] Glanvill.

Equally radical. [R.] Coleridge.

Having wheels of the same size or diameter; having equal rotation. [R.]

An equal sounding; the consonance of the unison and its octaves.