tetra-

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tetra-

or tetr-

pref.

1. Four: tetrode.

2. Containing four of a specified kind of atom, radical, or group: tetrachloride.

[Greek; see k^wetwer- 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.

tetra-

or before a vowel

tetr-

combining form

four: tetrameter.

[from Greek]

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

tet•ra

(ˈtɛ trə)

n., pl. -ras.

any of several small, brightly colored characin fishes, of tropical American waters.

[1930–35; shortening of New Latin Tetragonopterus former genus name. See tetragon, -o-, -pterous]

tetra-

a combining form meaning “four”: tetralogy.

Also, esp. before a vowel,tetr-.

[< Greek, comb. form of téttares four]

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