[ sahy-kluh-proh-peyn, sik-luh- ]
/ ˌsaɪ kləˈproʊ peɪn, ˌsɪk lə- /

noun Chemistry, Pharmacology.

a colorless, flammable gas, C3H6, used in organic synthesis and in medicine as an anesthetic.

Origin of cyclopropane

First recorded in 1890–95; cyclo- + propane
Also called trimethylene. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for cyclopropane


/ (ˌsaɪkləʊˈprəʊpeɪn, ˌsɪk-) /


a colourless flammable gaseous hydrocarbon, used in medicine as an anaesthetic; trimethylene. It is a cycloalkane with molecules containing rings of three carbon atoms. Formula: C 3 H 6; boiling pt: –34°C

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

Science definitions for cyclopropane


[ sī′klə-prōpān′, sĭk′lə- ]

A highly flammable, explosive, colorless gas that was once in wide use as an anesthetic but has been mostly replaced by less flammable gases. The three carbon atoms of cyclopropane form a triangular ring. Chemical formula: C3H6.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.