from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. One of the small gear wheels in an epicyclic train.

from the GNU version of the Collaborative International Dictionary of English

  • n. a gear wheel which revolves around the wheel with which it meshes, in an epicyclic train.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. an outer gear that revolves about a central sun gear of an epicyclic train


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