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psychoactive

[sahy-koh-ak-tiv]
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adjective
  1. of or relating to a substance having a profound or significant effect on mental processes: a psychoactive drug.
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Origin of psychoactive

First recorded in 1960–65; psycho- + active
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for psychoactive

psychoactive

adjective
  1. capable of affecting mental activitya psychoactive drug
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for psychoactive

adj.

also psycho-active, 1959, from psycho- + active.

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Online Etymology Dictionary, © 2010 Douglas Harper

psychoactive in Medicine

psychoactive

(sī′kō-ăktĭv)
adj.
  1. Affecting the mind or mental processes. Used of a drug.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.