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gear ratio
The ratio of the speeds of rotation of the initial and final gears in a gear train.
lift-to-drag ratio
(aviation) The instantaneous ratio of lift to drag of an aerodynamic article such as an a wing, entire aircraft or bird.
signal-to-noise ratio
(sciences) A figure of merit comparing the strength of a signal carrying information to the noise interfering with it.
price-earnings ratio
(finance) The ratio of share price to earnings per share used as an indication of the relative value of the share.
emergy investment ratio
(ecology) The ratio of purchased emergy to the local free environmental emergy.
type-token ratio
(corpus linguistics) The ratio of how many different words (types) occur in a text or corpus to the overall number of words (tokens) in the same text or corpus.
read-around ratio
(computing, historical) In cathode-ray-tube storage systems, the number of times that a value can be read from a given cell without corrupting adjacent stored values.
hog-corn ratio
The number of bushels of corn equal in value to 100 pounds of live hogs, used by farmers to decide whether it is more lucrative to sell their corn or to feed hogs with it and sell those.
