a combining form meaning “narrow,” “close,” used in the formation of compound words: stenopetalous.

Origin of steno-

From the Greek word stenós Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for steno-


before a vowel sten-

combining form

indicating narrowness or contractionstenography; stenosis

Word Origin for steno-

from Greek stenos narrow
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

Medical definitions for steno-



Narrow; small:stenothorax.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.