Definition of Momnt
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.
In a moment, in the twinkling of an
eye. 1 Cor. xv. 52.
2. Impulsive power; force;
momentum.
The moments or quantities of motion in
bodies. Berkley.
Touch, with lightest moment of impulse,
His free will. Milton.
3. Importance, as in influence or effect;
consequence; weight or value; consideration.
Matters of great moment.
Shak.
It is an abstruse speculation, but also of far less
moment and consequence of us than the others.
Bentley.
4. An essential element; a deciding point,
fact, or consideration; an essential or influential
circumstance.
5. (Math.) An infinitesimal change in
a varying quantity; an increment or decrement. [Obs.]
6. (Mech.) Tendency, or measure of
tendency, to produce motion, esp. motion about a fixed point or
axis.
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.
Syn. -- Instant; twinkling; consequence; weight; force;
value; consideration; signification; avail.
- Webster's Unabridged Dictionary (1913)
- a brief, unspecified amount of time
- The Nuttall Encyclopedia
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