WordReference Random House Unabridged Dictionary of American English © 2025
gear′ ra′tio, [Mach.]
- Mechanical Engineeringthe ratio of the rotational speeds of the first and final gears in a train of gears or of any two meshing gears.
- Mechanical Engineeringthe ratio of the diameters of the pitch surfaces of any two meshing gears or of the numbers of their teeth.
- 1905–10
'gear ratio' also found in these entries (note: many are not synonyms or translations):