A person or group that acts in an auxiliary manner.
An auxiliary verb.
A marching band colorguard.
A sailing vessel equipped with an engine.
Supplementary or subsidiary.
Helping; giving assistance or support.
Held in reserve for exceptional circumstances.
Of a ship, having both sails and an engine.
Relating to an auxiliary verb.
An operative person or thing.
Any of a class of behaviors that produce consequences by operating (i.e., acting) upon the environment.
That operates to produce an effect.