from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An omega-3 fatty acid found in fish oils.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An omega-3 fatty acid, having 20 carbon atoms and 5 double bonds, that acts as a precursor for prostaglandin-3, thromboxane-3, and leukotriene-5 groups.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an omega-3 fatty acid with 20 carbon atoms; found in fish (especially tuna and bluefish)
Greek eikosa-, twenty, from its twenty carbon atoms (from eikosi; see wīkm̥tī- in Indo-European roots) + -pentaene, having five double bonds (penta- + -ene).(American Heritage® Dictionary of the English Language, Fourth Edition)