planet gear

noun

, Machinery.

1. any of the gears in an epicyclic train surrounding and engaging with the sun gear.

Word History and Origins

Origin of planet gear¹

First recorded in 1915–20

Example Sentences

Find that Earth-sized planet, gear up our best technology, and sniff for a spectral biosignature.

From Scientific American

You can also watch his Planet Gear music video here.

From The Guardian