cosmic time
measure of time by a physical clock with zero peculiar velocity in the absence of matter over-/under-densities since the Big Bang
en-US/ˈkɑzmɪk ˈtaɪm/
en-GB/ˈkɒzmɪk ˈtaɪm/
measure of time by a physical clock with zero peculiar velocity in the absence of matter over-/under-densities since the Big Bang