English > ratio: 2 senses > noun 1, relation| Meaning | The relative magnitudes of two quantities (usually expressed as a quotient). |
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| Narrower | Mach number | The ratio of the speed of a moving body to the speed of sound |
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| abundance | (chemistry) the ratio of the total mass of an element in the earth's crust to the total mass of the earth's crust |
| abundance | (physics) the ratio of the number of atoms of a specific isotope of an element to the total number of isotopes present |
| 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 | (sports) the ratio of successful performances to opportunities |
| cephalic index, breadth index, cranial index | Ratio (in percent) of the maximum breadth to the maximum length of a skull |
| eccentricity | (geometry) a ratio describing the shape of a conic section |
| efficiency | The ratio of the output to the input of any system |
| 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 |
| facial index | The ratio (in percent) of the maximum width to the maximum height of the face |
| focal ratio, f number, stop number, speed | The ratio of the focal length to the diameter of a (camera / camera) lens system |
| frequency, relative frequency | The ratio of the number of observations in a statistical category / category to the total number of observations |
| hematocrit, haematocrit, packed cell volume | The ratio of the volume occupied by packed red blood cells to the volume of the whole blood as measured by a hematocrit |
| intelligence quotient, IQ, I.Q. | A measure of a person's intelligence as indicated by an intelligence test |
| load factor | (aeronautics) the ratio of an external load to the weight of the aircraft (measured in g) |
| loading | The ratio of the gross weight of an airplane to some factor determining its lift |
| loss ratio | The ratio of the annual claims paid by an insurance company to the premiums received |
| magnification | The ratio of the size of an image to the size of the object |
| margin of profit, profit margin, gross margin | The ratio gross profits divided by net sales |
| mechanical advantage | The ratio of the force exerted by a machine to the force applied to it |
| mileage, fuel consumption rate, gasoline mileage, gas mileage | The ratio of the number of miles traveled to the number of gallons of gasoline burned |
| odds, betting odds | The ratio by which one better's wager is greater than that of another |
| order of magnitude, magnitude | A number assigned to the ratio of two quantities |
| output-to-input ratio | The output power of a transducer divided by the input power |
| prevalence | (epidemiology) the ratio (for a given time period) of the number of occurrences of a disease or event to the number of units at risk in the population |
| price-to-earnings ratio, P/E ratio | (stock market) the price / 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 ratio of two quantities to be divided |
| refractive index, index of refraction | 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 |
| 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 |
| safety factor, factor of safety | The ratio of the breaking stress of a structure to the estimated maximum stress in ordinary use |
| signal-to-noise ratio, signal-to-noise, signal/noise ratio, signal/noise, S/N | 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 |
| Broader | magnitude relation, quantitative relation | A relation between magnitudes |
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| Spanish | cociente, índice, proporción, ratio, razón aritmética, razón, relación |
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| Catalan | índex, proporció, raó, ràtio, relació |
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| Adjectives | irrational | real but not expressible as the quotient of two integers |
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| rational | capable of being expressed as a quotient of integers |
