# Moment of inertia

- Moment Mo"ment, n. [F. moment, L. momentum, for movimentum
movement, motion, moment, fr. movere to move. See {Move}, and
cf. {Momentum}, {Movement}.]
1. A minute portion of time; a point of time; an instant; as,
at that very moment.
[1913 Webster]
In a moment, in the twinkling of an eye. --1 Cor. xv. 52. [1913 Webster]

2. Impulsive power; force; momentum. [1913 Webster]

The moments or quantities of motion in bodies. --Berkley. [1913 Webster]

Touch, with lightest moment of impulse, His free will. --Milton. [1913 Webster]

3. Importance, as in influence or effect; consequence; weight or value; consideration. [1913 Webster]

Matters of great moment. --Shak. [1913 Webster]

It is an abstruse speculation, but also of far less moment and consequence of us than the others. --Bentley. [1913 Webster]

4. An essential element; a deciding point, fact, or consideration; an essential or influential circumstance. [1913 Webster]

5. (Math.) An infinitesimal change in a varying quantity; an increment or decrement. [Obs.] [1913 Webster]

6. (Mech.) Tendency, or measure of tendency, to produce motion, esp. motion about a fixed point or axis. [1913 Webster]

{Moment of a couple} (Mech.), the product of either of its forces into the perpendicular distance between them.

{Moment of a force}. (Mech.) (a) With respect to a point, the product of the intensity of the force into the perpendicular distance from the point to the line of direction of the force. (b) With respect to a line, the product of that component of the force which is perpendicular to the plane passing through the line and the point of application of the force, into the shortest distance between the line and this point. (c) With respect to a plane that is parallel to the force, the product of the force into the perpendicular distance of its point of application from the plane.

{Moment of inertia}, of a rotating body, the sum of the mass of each particle of matter of the body into the square of its distance from the axis of rotation; -- called also {moment of rotation} and {moment of the mass}.

{Statical moment}, the product of a force into its leverage; the same as {moment of a force} with respect to a point, line, etc.

{Virtual moment}. See under {Virtual}. [1913 Webster]

Syn: Instant; twinkling; consequence; weight; force; value; consideration; signification; avail. [1913 Webster]

*The Collaborative International Dictionary of English.
2000.*

### Look at other dictionaries:

**Moment of inertia**— This article is about the moment of inertia of a rotating object, also termed the mass moment of inertia. For the moment of inertia dealing with the bending of a beam, also termed the area moment of inertia, see second moment of area. In… … Wikipedia**moment of inertia**— This is similar to inertia except that it relates to rotating movement rather than linear movement. Linear movement is the tendency of an object to remain motionless if at rest and to keep moving in a straight line if already in motion. The… … Dictionary of automotive terms**moment of inertia**— inercijos momentas statusas T sritis Standartizacija ir metrologija apibrėžtis Dydis, išreiškiamas kūno masės elementų ir jų atstumų nuo tam tikros ašies kvadratų sandaugų suma (integralu). atitikmenys: angl. inertia moment; moment of inertia;… … Penkiakalbis aiškinamasis metrologijos terminų žodynas**moment of inertia**— inercijos momentas statusas T sritis automatika atitikmenys: angl. inertia moment; moment of inertia vok. Trägheitsmoment, n rus. момент инерции, m pranc. moment d inertie, m … Automatikos terminų žodynas**moment of inertia**— inercijos momentas statusas T sritis fizika atitikmenys: angl. inertia moment; moment of inertia vok. Massenträgheitsmoment, n; Trägheitsmoment, n rus. момент инерции, m pranc. moment d’inertie, m … Fizikos terminų žodynas**moment of inertia**— noun a) A measure of a bodys resistance to a change in its angular rotation velocity b) A measure of a bodys resistance to bending; second moment of inertia; … Wiktionary**moment of inertia**— 1) a property of an object relating to the magnitude of the moment required to rotate the object and overcome its inertia. 2) a property of a two dimensional cross section shape with respect to an axis, usually an axis through the centroid of the … Mechanics glossary**moment of inertia**— noun the tendency of a body to resist angular acceleration • Hypernyms: ↑inertia, ↑moment … Useful english dictionary**moment of inertia**— force of inertia of a body in relation to the momentum … English contemporary dictionary**moment of inertia**— Date: 1830 a measure of the resistance of a body to angular acceleration about a given axis that is equal to the sum of the products of each element of mass in the body and the square of the element s distance from the axis … New Collegiate Dictionary