or bi·cy·cli·cal

[bahy-sahy-klik, -sik-lik or bahy-sahy-kli-kuh l, -sik-li-kuh l]
  1. consisting of or having two cycles or circles.
  2. Botany. in two whorls, as the stamens of a flower.
  3. pertaining to or resembling a bicycle.

Origin of bicyclic

First recorded in 1875–80; bi-1 + cyclic Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for bicyclic



  1. of, forming, or formed by two circles, cycles, etc
  2. (of stamens, petals, etc) arranged in two whorls
  3. (of a chemical compound) having atoms arranged in two rings fused together with at least two atoms common to each ringnaphthalene is bicyclic
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

bicyclic in Science


[bī-sīklĭk, -sĭklĭk]
  1. Relating to a compound having two closed rings. Naphthalene is a bicyclic compound.
  2. Composed of or arranged in two distinct whorls, as the petals of a flower.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.