conditioned stimulus(n = noun.cognition) - the stimulus that is the occasion for a conditioned response;
is a kind of input, stimulant, stimulation, stimulus

aversive stimulus, conditioned, conditioned avoidance, conditioned avoidance response, conditioned emotion, conditioned emotional response, conditioned reaction, conditioned reflex, conditioned response, discriminative stimulus, negative reinforcing stimulus, negative stimulus, positive reinforcing stimulus, positive stimulus, reinforcing stimulus, stimulus, stimulus generalisation, stimulus generalization