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Szótár

rapidity []

n sebesség [ʃˈɛbɛʃʃeːɡ]

n gyorsaság [ɟˈorʃɑʃaːɡ]

n speed, swiftness; the condition of being rapid

n (physics) A measure of velocity relative to the speed of light

n (physics) A measure of the velocity of a particle in a beam relative to the beam#s axis