(physics) Any of the coordinates, a minimum number of which are needed to specify the motion of a mechanical system.

To ship cargo by the use of aircraft.

(meteorology) The altitude at which the temperature of the atmosphere is 0°C at a specific location

Alternative spelling of freefall

Alternative spelling of freefall

(of a person or couple) Having no children, biological, step, or adopted, as a matter of choice.

Able to do as one pleases, unconstrained by social ties or responsibilities.

non-esterified fatty acid

(physics, thermodynamics) A measure of the useful work obtainable from a constant temperature, constant volume thermodynamic system; more precisely, the difference between internal energy (of a system) and the product of its absolute temperature and entropy.

The principles of a freethinker; freethinking