na velocidade da luz

Portuguese edit

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Literally, “at the speed of light”

(Brazil) IPA^(key): /na ve.lo.siˈda.d͡ʒi da ˈlu(j)s/ [na ve.lo.siˈda.d͡ʒi da ˈlu(ɪ̯)s]
- (Rio de Janeiro) IPA^(key): /na ve.lo.siˈda.d͡ʒi da ˈlu(j)ʃ/ [na ve.lo.siˈda.d͡ʒi da ˈlu(ɪ̯)ʃ]
- (Southern Brazil) IPA^(key): /na ve.lo.siˈda.de da ˈlu(j)s/ [na ve.lo.siˈda.de da ˈlu(ɪ̯)s]

(Portugal) IPA^(key): /nɐ vɨ.lu.siˈda.dɨ dɐ ˈluʃ/ [nɐ vɨ.lu.siˈða.ðɨ ðɐ ˈluʃ]
- (Northern Portugal) IPA^(key): /nɐ bɨ.lu.siˈda.dɨ dɐ ˈluʃ/ [nɐ βɨ.lu.siˈða.ðɨ ðɐ ˈluʃ]

na velocidade da luz (Brazilian spelling)

at speed of light, lightspeed
- 2022, CiênciaTodoDia, Por que é IMPOSSÍVEL Chegar na Velocidade da Luz? (yt):
  A luz não tem massa e se move pelo espaço na velocidade da luz sempre.
  Light has no mass and always moves through space at the speed of light.
(informal) at lightspeed