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polycyclic

[pol-ee-sahy-klik, -sik-lik]
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adjective Chemistry.
  1. pertaining to an organic compound containing several atomic rings, usually fused.

Origin of polycyclic

First recorded in 1865–70; poly- + cyclic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for polycyclic

Historical Examples

  • Pierced Roger's polycyclic screen; exposed the bare metal of Roger's walls!

    Triplanetary

    Edward Elmer Smith

  • That must be that polycyclic screen that Conway reported on.

    Triplanetary

    Edward Elmer Smith


British Dictionary definitions for polycyclic

polycyclic

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 whorlspolycyclic shells; a polycyclic stele
noun
  1. a polycyclic compoundanthracene 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

polycyclic in Science

polycyclic

[pŏl′ĭ-sīklĭk, -sĭklĭk]
  1. Having two or more atomic rings in a molecule. Steroids are polycyclic compounds.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.