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Definitions

American Heritage® Dictionary of the English Language, Fourth Edition

  1. n. A bitter crystalline alkaloid, C17H19NO3·H2O, extracted from opium, the soluble salts of which are used in medicine as an analgesic, a light anesthetic, or a sedative. Also called morphia.

Century Dictionary and Cyclopedia

  1. n. An alkaloid, C17H19N03, the most important narcotic principle of opium. It crystallizes in brilliant, colorless, odorless, and bitter prisms. It dulls pain, induces sleep, promotes perspiration, checks peristalsis, contracts the pupil, and is extensively used in medicine in the form of its soluble salts. In large doses it causes death with narcotic symptoms.

Wiktionary

  1. n. A crystalline alkaloid (7,8-didehydro-4,5-epoxy-17-methyl-morphinan-3,6-diol), extracted from opium, the salts of which are soluble in water and are used as analgesics, anaesthetics and sedatives; it is one of a group of morphine alkaloids.

GNU Webster's 1913

  1. n. A bitter white crystalline alkaloid found in opium, possessing strong narcotic properties, and much used as an anodyne; -- called also morphia, and morphina.

WordNet 3.0

  1. n. an alkaloid narcotic drug extracted from opium; a powerful, habit-forming narcotic used to relieve pain

Etymologies

  1. French, from Morphée, Morpheus, from Latin Morpheus.

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‘morphine’ has been looked up 1922 times, loved by 2 people, added to 14 lists, and has a Scrabble score of 15.