noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   The base chemical structure of a large class of psychoactive drugs, consisting of opioid analgesics, antitussives, and dissociative hallucinogens, among others. countable, uncountable

Etymology

From morphine + -an.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.