a gear having teeth cut on an inner cylindrical surface.
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- internal elastic lamina,
- internal energy,
- internal exile,
- internal fistula,
- internal fixation,
- internal hemorrhage,
- internal hemorrhoid,
- internal hemorrhoids,
- internal iliac artery,
- internal iliac vein
Also called annular gear, ring gear.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019