LATIN DICTIONARYLexicon Latīnum
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“colonel” in Latin

The English word colonel itself goes back to Latin columen, through columna.

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

colonel
dux praefectusque militum: plur., primorum ordinum centuriones: tribunus militum (of infantry): praefectus (of cavalry): praefectus praetorio (time of the emperors, colonel of the imperial guards). Lieulenant-colonel (perhaps) legatus: to be colonel, ordines ducere: the rank of a colonel, centuriatus: in hopes of being made colonel, spe ordinis (Caes., B.G., 1, 3).

Quick answer

What is the Latin word for colonel?
The usual Latin words for “colonel” are praeficiō, legō, centuriō. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.