stimulus
/ˈstɪm.jə.ləs/ noun
Forms stimuluses stimuli
- noun An external phenomenon that has an influence on a system, by triggering or modifying an internal phenomenon; for example, a spur or incentive that drives a person to take action or change behaviour. “respond to a stimulus”
- noun (physiology, psychology, medicine) Something external that elicits or influences a physiological or psychological activity or response, or that affects any of the sensory apparatuses.
- noun (botany, entomology) A stinging part on the body of a plant or insect.
Synonyms
influence impetus impulse spur trigger stimulation stimulant input
Etymology
Borrowed from Latin stimulus (“goad, prick”).
Webster’s 1913
- noun A goad; hence, something that rouses the mind or spirits; an incentive; as, the hope of gain is a powerful stimulus to labor and action.
- noun That which excites or produces a temporary increase of vital action, either in the whole organism or in any of its parts; especially (Physiol.), any substance or agent capable of evoking the activity of a nerve or irritable muscle, or capable of producing an impression upon a sensory organ or more particularly upon its specific end organ.
Etymology [L., for stigmulus, akin to L. instigare to stimulate. See Instigare, Stick, v. t.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “stimulus”, CC BY-SA 4.0. Details