noun 
1. 
ratio  the relative magnitudes of two quantities (usually expressed as a quotient) 


magnitude relation,
quantitative relation a relation between magnitudes



gross margin,
margin of profit,
profit margin the ratio gross profits divided by net sales



abundance the property of a more than adequate quantity or supply; "an age of abundance"



abundance the property of a more than adequate quantity or supply; "an age of abundance"



albedo,
reflective power the ratio of reflected to incident light



aspect ratio the ratio of the width to the height of a tv picture



average an intermediate scale value regarded as normal or usual; "he is about average in height"; "the snowfall this month is below average"



breadth index,
cephalic index,
cranial index ratio (in percent) of the maximum breadth to the maximum length of a skull



efficiency skillfulness in avoiding wasted time and effort; "she did the work with great efficiency"



facial index the ratio (in percent) of the maximum width to the maximum height of the face



f number,
focal ratio,
stop number,
speed the ratio of the focal length to the diameter of a (camera) lens system



relative frequency,
frequency the number of observations in a given statistical category



packed cell volume,
haematocrit,
hematocrit a measuring instrument to determine (usually by centrifugation) the relative amounts of corpuscles and plasma in the blood



i.q.,
intelligence quotient,
iq a measure of a person's intelligence as indicated by an intelligence test; the ratio of a person's mental age to their chronological age (multiplied by 100)



load factor (aeronautics) the ratio of an external load to the weight of the aircraft (measured in g)



loss ratio the ratio of the annual claims paid by an insurance company to the premiums received



mach number the ratio of the speed of a moving body to the speed of sound



magnification the act of expanding something in apparent size



mechanical advantage the ratio of the force exerted by a machine to the force applied to it



fuel consumption rate,
gas mileage,
gasoline mileage,
mileage distance measured in miles



betting odds,
odds the likelihood of a thing occurring rather than not occurring



order of magnitude,
magnitude a number assigned to the ratio of two quantities; two quantities are of the same order of magnitude if one is less than 10 times as large as the other; the number of magnitudes that the quantities differ is specified to within a power of 10



outputtoinput ratio the output power of a transducer divided by the input power



prevalence the quality of prevailing generally; being widespread; "he was surprised by the prevalence of optimism about the future"



p/e ratio,
pricetoearnings ratio (stock market) the price of a stock divided by its earnings



productivity (economics) the ratio of the quantity and quality of units produced to the labor per unit of time



proportionality a ratio of two quantities that is constant



quotient the number obtained by division



index of refraction,
refractive index the ratio of the velocity of light in a vacuum to that in a medium



relative humidity the ratio of the amount of water in the air at a give temperature to the maximum amount it could hold at that temperature; expressed as a percentage



respiratory quotient the ratio of the volume of carbon dioxide expired to the volume of oxygen consumed by an organism or cell in a given period of time



factor of safety,
safety factor the ratio of the breaking stress of a structure to the estimated maximum stress in ordinary use



s/n,
signaltonoise,
signaltonoise ratio,
signal/noise,
signal/noise ratio the ratio of signal intensity to noise intensity



stoichiometry (chemistry) the relation between the quantities of substances that take part in a reaction or form a compound (typically a ratio of whole integers)



time constant the ratio of the inductance of a circuit in henries to its resistance in ohms



employee turnover,
turnover rate,
turnover the ratio of the number of workers that had to be replaced in a given time period to the average number of workers



loading the labor of putting a load of something on or in a vehicle or ship or container etc.; "the loading took 2 hours"



eccentricity strange and unconventional behavior
