(US, euphemistic, military) A reporting term to identify an event involving a nuclear reactor or radiological accident.

facing forward / across from; opposite

(vulgar, slang) A person's facial expression during orgasm.

(science fiction) A hypothetical figure describing a speed of one light-year per hour.

(idiomatic, informal) To eat excessively.

An experiment in which all combinations of multiple parameters or variables are each tested

(electrical, engineering) The ratio of the actual power to the apparent power in an alternating current power system; specifically, the cosine of the phase angle between the voltage and the current.

(engineering) The ratio of the maximum stress or load which something can withstand to the stress or load which it was designed to withstand under normal operation.

(biochemistry) A signalling protein that regulates vasculogenesis.

(telecommunications) In the Open Systems Interconnection-Reference Model (OSI-RM), the transfer of data from one layer (N) to the next higher layer (N+1).