A sensor that is sensitive and produces a signal in response to infrared light.

Take in by swallowing or absorbing.

Breathing in.

To hinder or to restrain progress.

A chemical added to retard or prevent a particular reaction.

A simple switch that prevents the operation of a circuit. A good example is the switch in an automatic transmission gearbox that prevents operation of the starter motor when drive or reverse is engaged.

A chemical that restricts or reduces the chemical reactions. In a cooling system an inhibitor is added to prevent corrosion of the engine from the ethylene glycol content of the antifreeze.

This is carried out to find a candidates strengths and weaknesses, current levels of attainment and potential.

A chemical added to help start a chemical reaction such as polymerization or curing.

Injector valve.