We found 11 dictionaries that define the word psychoactive substance:

General (7 matching dictionaries)

1. psychoactive substance: Vocabulary.com
2. psychoactive substance: Dictionary.com
3. Psychoactive substance: Wikipedia, the Free Encyclopedia
4. psychoactive substance: Rhymezone
5. psychoactive substance: FreeDictionary.org
6. psychoactive substance: Mnemonic Dictionary
7. psychoactive substance: TheFreeDictionary.com

Business (1 matching dictionary)

8. psychoactive substance: Legal dictionary

Computing (1 matching dictionary)

9. psychoactive substance: Encyclopedia

Medicine (2 matching dictionaries)

10. Dorland's Illustrated Medical Dictionary (No longer online)
11. psychoactive substance: Medical dictionary

(Note: See psychoactive_substances as well.)

Definitions from WordNet (psychoactive substance) ▸ noun:  a drug that can produce mood changes and distorted perceptions Opposite: non-psychoactive, inert, inactive, non-intoxicating Phrases: psychoactive substance dependence, psychoactive substance use disorders, psychoactive substance abuse, more... ▸ Words similar to psychoactive substance ▸ Usage examples for psychoactive substance ▸ Idioms related to psychoactive substance ▸ Wikipedia articles (New!) ▸ Words that often appear near psychoactive substance ▸ Rhymes of psychoactive substance ▸ Invented words related to psychoactive substance