(physiology) The discharge of an action potential by a neuron.

(medicine) The old technique where fire or extreme heat is used in cautery.


(1) The process of combustion where a fuel is ignited and combined with oxygen, releasing heat and light.

(2) The act of discharging, especially of a gun.

(3) The fuel or firewood or coal.


Word origin: Middle English fir, from Old English fȳr.

See also: fire

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