单词 | natural unit |
释义 | natural unit/ˌnatʃ(ə)rəl ˈjuːnɪt/ /ˌnatʃ(ə)r(ə)l ˈjuːnɪt/noun 1A unit of measurement that is considered to be natural; especially one based on the fundamental properties of the object, space, system, etc., under consideration. 2 Physics. A unit of measurement in a system in which certain fundamental constants (the speed of light c, Planck's constant h or ℏ, and the constant of gravitation G) are set equal to unity. OriginEarly 19th century; earliest use found in The North American Review. From natural + unit adjective. |
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