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 kwetwer- in Indo-European roots.]

tetra-

or before a vowel

tetr-

combining form
four: tetrameter.
[from Greek]

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]