| constant | | |
| n. (cognition) | 1. constant, constant quantity, invariable | a quantity that does not vary. |
| ~ quantity | the concept that something has a magnitude and can be represented in mathematical expressions by a constant or a variable. |
| ~ parameter, parametric quantity | a constant in the equation of a curve that can be varied to yield a family of similar curves. |
| n. (quantity) | 2. constant | a number representing a quantity assumed to have a fixed value in a specified mathematical context.; "the velocity of light is a constant" |
| ~ number | a concept of quantity involving zero and units.; "every number has a unique position in the sequence" |
| ~ avogadro's number, avogadro number | the number of molecules in a mole of a substance (approximately 602,250,000,000,000,000,000,000). |
| ~ boltzmann's constant | constant used in the calculation of the ideal gas constant. |
| ~ coefficient | a constant number that serves as a measure of some property or characteristic. |
| ~ cosmological constant | an arbitrary constant in the equations of general relativity theory. |
| ~ equilibrium constant | (chemistry) the ratio of concentrations when equilibrium is reached in a reversible reaction (when the rate of the forward reaction equals the rate of the reverse reaction). |
| ~ gas constant, universal gas constant, r | (physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole. |
| ~ constant of gravitation, gravitational constant, universal gravitational constant, g | (physics) the universal constant relating force to mass and distance in Newton's law of gravitation. |
| ~ hubble's constant, hubble's parameter, hubble constant, hubble parameter | (cosmology) the ratio of the speed of recession of a galaxy (due to the expansion of the universe) to its distance from the observer; the Hubble constant is not actually a constant, but is regarded as measuring the expansion rate today. |
| ~ ionic charge | the charge on an ion is equal to a constant charge e multiplied by an integer from 1 to 15. |
| ~ constant of proportionality, factor of proportionality | the constant value of the ratio of two proportional quantities x and y; usually written y = kx, where k is the factor of proportionality. |
| ~ light speed, speed of light, c | the speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 meters per second. |
| adj. | 3. changeless, constant, invariant, unvarying | unvarying in nature.; "maintained a constant temperature"; "principles of unvarying validity" |
| ~ invariable | not liable to or capable of change.; "an invariable temperature"; "an invariable rule"; "his invariable courtesy" |
| adj. | 4. constant | steadfast in purpose or devotion or affection.; "a man constant in adherence to his ideals"; "a constant lover"; "constant as the northern star" |
| ~ unchangeable | not changeable or subject to change.; "a fixed and unchangeable part of the germ plasm"; "the unchangeable seasons"; "one of the unchangeable facts of life" |
| ~ staunch, steadfast, unswerving | firm and dependable especially in loyalty.; "a steadfast ally"; "a staunch defender of free speech"; "unswerving devotion"; "unswerving allegiance" |
| ~ unflagging, unfailing | unceasing.; "unfailing loyalty"; "unfailing good spirits"; "unflagging courtesy" |
| ~ faithful | steadfast in affection or allegiance.; "years of faithful service"; "faithful employees"; "we do not doubt that England has a faithful patriot in the Lord Chancellor" |
| ~ stable | resistant to change of position or condition.; "a stable ladder"; "a stable peace"; "a stable relationship"; "stable prices" |
| ~ invariable | not liable to or capable of change.; "an invariable temperature"; "an invariable rule"; "his invariable courtesy" |
| adj. | 5. ceaseless, constant, incessant, never-ending, perpetual, unceasing, unremitting | uninterrupted in time and indefinitely long continuing.; "the ceaseless thunder of surf"; "in constant pain"; "night and day we live with the incessant noise of the city"; "the never-ending search for happiness"; "the perpetual struggle to maintain standards in a democracy"; "man's unceasing warfare with drought and isolation"; "unremitting demands of hunger" |
| ~ continuous, uninterrupted | continuing in time or space without interruption.; "a continuous rearrangement of electrons in the solar atoms results in the emission of light"; "a continuous bout of illness lasting six months"; "lived in continuous fear"; "a continuous row of warehouses"; "a continuous line has no gaps or breaks in it"; "moving midweek holidays to the nearest Monday or Friday allows uninterrupted work weeks" |
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