Noun
(automotive) The point where the clutch engages when the pedal is released.
Synonym: bite point
(more generally) The precise position at which a control mechanism as been moved just enough to cause a device to operate.
(figuratively) The point or set of circumstances when a particular action can begin or a critical transition can occur.
The level of aggravation that causes someone or something to lash out or bite.
The position of the jaw where the upper and lower teeth meet during a bite
The location where something is bitten.
The point of a blade or similar item where it begins to bite or penetrate.
Source: en.wiktionary.org