LATIN DICTIONARYLexicon Latīnum
English → Latin

“planet” in Latin

The English word planet itself goes back to Latin planēta.

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

planet
stella errans; sidus errans, in the plur. also, stellae quae errantes et quasi vagae nominantur; astra non re, sed vocabulo, errantes: the (five) planets, (quinque) stellae eosdem cursus constantissime servantes: ☞ planeta (planetes) is not found in good prose): the orbit of a planet, circulus et orbis stellae errantis.

Quick answer

What is the Latin word for planet?
The usual Latin words for “planet” are errō, planēta. 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.