metro-(redirected from metra-)
Also found in: Medical.
metro-(word root) measure
Examples of words with the root metro-: metronome
Abused, Confused, & Misused Words by Mary Embree Copyright © 2007, 2013 by Mary Embree
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
metro-or before a vowel
(Anatomy) indicating the uterus: metrorrhagia.
[from Greek mētra womb]
indicating a measure: metronome.
[from Greek metron measure]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
n., pl. -ros. (often cap.)
the underground electric railway of certain cities, as Washington and Paris.
[1900–05; < French, short for chemin de fer métropolitain metropolitan railroad]
adj., n., pl. -ros. Informal. adj.
3. (often cap.) Chiefly Canadian. the government or jurisdiction of a large city.
[1900–05; by shortening; or independent use of metro-3]
a combining form meaning “measure”: metronome.
[comb. form representing Greek métron measure]
a combining form meaning “uterus”: metrorrhagia.
[comb. form representing Greek mḗtra womb]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.