DICTIONARY ENTRY
3 SYLLABLES
hubble constant
Hubble constant has 3 syllables: hub · ble con · stant.
hub
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ble con
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stant
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noun. (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.
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