(quantum mechanics) A momentary fluctuation in the energy at a point in space due to the Heisenberg uncertainty principle

(anatomy) A transparent, viscous, non-Newtonian lubricating fluid which is found in the cavities of synovial joints or bursae and secreted by the synovial membrane; its main purpose is to reduce friction between the articular cartilage of synovial joints during movement.

(colloquial) cerebrospinal fluid

(colloquial) cerebrospinal fluid

A fluid that functions as a coolant and lubricant in a machine tool

(New England) marshmallow creme

A special fluid for operating hydraulic brakes and clutches, which are linked by pipe to a master cylinder. / (prison slang) Sedative drugs used to calm down a prisoner.

Any of several parasitic trematode worms that infect the livers of various mammals, including humans.

A parasitic flatworm, Fasciola hepatica, of the class Trematoda, that infects the livers of various mammals, including humans.

A theorem dealing with the relative probability that the entropy of a system that is currently away from thermodynamic equilibrium (i.e. maximum entropy) will increase or decrease over a given amount of time.