(quantum field theory) A physical force of attraction between very closely separated objects, due to random quantum fluctuations of the electromagnetic field in a vacuum; it is inversely proportional to the fourth power of the distance of separation

The collective group of people who are available for employment, whether currently employed or unemployed (though sometimes only those unemployed people who are seeking work are included).

The hypothetical principle that animates all living organisms. / An impulse or influence that gives something life or vitality.

(physics) The turning effect of a force applied to a rotational system at a distance from the axis of rotation. The moment is equal to the magnitude of the force multiplied by the perpendicular distance between its line of action and the axis of rotation.

The convection (carriage) of contents of a fluid, such as mass or (especially) heat, by means of currents induced in the fluid by a force which is not dependent on density changes in the fluid induced by heat.

plural of force multiplier

plural of force play

plural of forced convection

plural of forced march

plural of force-field