stimulus
Stimulus (noun) means something that triggers a reaction or response. Example: “Bright light is a strong stimulus that makes the pupil shrink.”
How to use stimulus
Learner’s notesIn plain EnglishAnything that sets off a reaction, from a nerve response to an economic boost.
The plural is "stimuli", not "stimuluses".
Word forms
- Plural
- stimuluses, stimuli
Fill the gap
Can you complete this real example?
Bright light is a strong _____ that makes the pupil shrink.
Etymology
Borrowed directly from Latin stimulus, meaning "goad" or "prick" — the thing used to spur an ox forward.