sun gear

1. 1.

   the central gear in an epicyclic train

   Broadergear

   Part ofepicyclic train

Questions about sun gear

What does sun gear mean?

sun gear means "the central gear in an epicyclic train".

Is sun gear a common word?

sun gear is banded "Uncommon" — turns up in careful writing rather than conversation. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.