A stimulus that naturally and automatically triggers a response without any prior learning or conditioning.
From 'un-' (not) + Latin 'condicio' (agreement) + 'stimulus' (goad). A stimulus that needs no conditioning to work.
An unconditioned stimulus naturally triggers a response — food makes you salivate, a puff of air makes you blink. No learning required!
Complete word intelligence in one call. Free tier — 50 lookups/day.