Also found in: Dictionary, Thesaurus, Acronyms, Encyclopedia, Wikipedia.
One of various distinct forms of a species (such as color variant) or of an organism during different parts of its life cycle.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
morphineAn opium alkaloid with potent analgesic effect that owes its narcotic properties to its unique aromatic ring structure.
Euphoria, respiratory depression, drowsiness, nausea, vomiting, decreased GI motility, increased risk of addiction.
Blocks pain signals to brain and spinal cord.
Relieves severe acute and chronic pain; facilitates induction of anaesthesia.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
morphany individual variant that constitutes a form of a polymorphic species.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005