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Adjective: stimulative  'sti-myu,ley-tiv [N. Amer], sti-myû-lu-tiv [Brit]
  1. Capable of arousing or accelerating physiological or psychological activity or response by a chemical agent
    "The aim of the present study was to test the effects of sedative and stimulative music on the activity levels of retardates"

See also: adrenocorticotrophic, adrenocorticotropic, analeptic, excitant, excitative, excitatory, irritating, irritative, stimulant, stimulating

Antonym: depressant