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polycyclic

[pol-ee-sahy-klik, -sik-lik] /ˌpɒl iˈsaɪ klɪk, -ˈsɪk lɪk/
adjective, Chemistry
1.
pertaining to an organic compound containing several atomic rings, usually fused.
Origin
1865-1870
1865-70; poly- + cyclic
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for polycyclic
  • The smallest polycyclic compounds contain multiple fused cyclopentane rings.
British Dictionary definitions for polycyclic

polycyclic

/ˌpɒlɪˈsaɪklɪk/
adjective
1.
(of a molecule or compound) containing or having molecules that contain two or more closed rings of atoms
2.
(biology) having two or more rings or whorls: polycyclic shells, a polycyclic stele
noun
3.
a polycyclic compound: anthracene is a polycyclic
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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polycyclic in Science
polycyclic
  (pŏl'ĭ-sī'klĭk, -sĭk'lĭk)   
Having two or more atomic rings in a molecule. Steroids are polycyclic compounds.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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