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sun-and-planet gear

American

[suhn-uhn-plan-it] / ˈsʌn ənˈplæn ɪt /

noun

Machinery.

a planetary epicyclic gear train.

Etymology

Origin of sun-and-planet gear

First recorded in 1900–05

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.