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

metro-

or metr-
pref.
Uterus: metritis.

[From Greek mētrā, uterus, from mētēr, mētr-, mother; see māter- in Indo-European roots.]
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

metr-

combining form
(Anatomy) indicating the uterus: metrorrhagia.
[from Greek mētra womb]

metro-

combining form
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

met•ro1

(ˈmɛ troʊ)

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]

met•ro2

(ˈmɛ troʊ)

adj., n., pl. -ros. Informal. adj. n.
3. (often cap.) Chiefly Canadian. the government or jurisdiction of a large city.
[1900–05; by shortening; or independent use of metro-3]

metro-1

,
a combining form meaning “measure”: metronome.
[comb. form representing Greek métron measure]

metro-2

,
a combining form meaning “uterus”: metrorrhagia.
[comb. form representing Greek mḗtra womb]

metro-3

,
a combining form representing metropolis or metropolitan: metroflight; metroland; Metroliner.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.