Stimulus Stim"u*lus, n.; pl. {Stimuli}. [L., for stigmulus, akin to L. instigare to stimulate. See {Instigare}, {Stick}, v. t.] 1. 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. [1913 Webster]

2. 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. [1913 Webster]

Note: Of the stimuli applied to the sensory apparatus, physiologists distinguish two kinds: (a) {Homologous stimuli}, which act only upon the end organ, and for whose action the sense organs are especially adapted, as the rods and cones of the retina for the vibrations of the either. (b) {Heterologous stimuli}, which are mechanical, chemical, electrical, etc., and act upon the nervous elements of the sensory apparatus along their entire course, producing, for example, the flash of light beheld when the eye is struck. --Landois & Stirling. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • stimuli — Latinate plural of STIMULUS (Cf. stimulus) …   Etymology dictionary

  • stimuli — ● stimulus, stimulus ou stimuli nom masculin (latin stimulus, aiguillon) Tout élément physique, chimique ou biologique capable de déclencher des phénomènes dans l organisme, notamment des phénomènes nerveux, musculaires ou endocriniens. ●… …   Encyclopédie Universelle

  • Stimuli — Reiz und Reizantwort Ein Reiz oder Stimulus (Mehrzahl: Stimuli) im Sinne der Neurobiologie ist eine Einwirkung von außerhalb einer Sinneszelle, welche eine überschwellige Depolarisation der Zellmembran bewirkt und so ein Aktionspotenzial auslöst …   Deutsch Wikipedia

  • Stimuli — Stimulus En psychologie, un stimulus (au pluriel, stimuli) est un agent matériel susceptible de provoquer un changement de comportement chez le sujet observé (humain ou non). Dans le domaine de la psychologie expérimentale et de la biologie, un… …   Wikipédia en Français

  • Stimuli — Sti|mu|li: Pl. von ↑ Stimulus. * * * Sti|mu|li: Pl. von ↑Stimulus …   Universal-Lexikon

  • stimuli — stim·u·li (stimґu li) plural of stimulus …   Medical dictionary

  • Stimuli — Sti|mu|li: Plur. von ↑Stimulus …   Das große Fremdwörterbuch

  • stimuli — stim·u·lus || stɪmjÉ™lÉ™s / mjÊŠl n. something which incites to action; something which quickens a physical or mental process …   English contemporary dictionary

  • stimuli — sti|mu|li sti|mu|li pl. af stimulus …   Dansk ordbog

  • Stimuli et Clavi — i. e. theses adversus huius temporis errores et abusus: Spieße und Nägel d.i. Streitsätze wider die Irrnisse und Wirrnisse unserer Zeit (Goads and Nails, that is, Theses Against Errors and Abuses of This Time). 95 theses published by North German …   Wikipedia

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