Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

psychoactive

play
adjective psy·cho·ac·tive \ˌsī-kō-ˈak-tiv\

Definition of psychoactive

  1. :  affecting the mind or behavior <psychoactive drugs>



1961

First Known Use of psychoactive

1961


Medical Dictionary

psychoactive

play
adjective psy·cho·ac·tive \ˌsī-kō-ˈak-tiv\

Medical Definition of psychoactive

  1. :  affecting the mind or behavior <psychoactive drugs> <THC is the principal psychoactive ingredient in marijuana>




Learn More about psychoactive

  1. Medical Dictionary: Definition of "psychoactive"


Seen and Heard

What made you want to look up psychoactive? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

February 6, 2016

an official order, decree, or edict

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

pince-nez kittly-benders spindrift duvet
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ