hydrogen maser atomic clock
Noun
Meaning
hydrogen maser atomic clock (plural hydrogen maser atomic clocks)
an atomic clock which uses the 1.4 GHz transition in a hydrogen atom to measure time to within 0.45 nanosecond over a span of 12 hours
Noun
hydrogen maser atomic clock (plural hydrogen maser atomic clocks)
an atomic clock which uses the 1.4 GHz transition in a hydrogen atom to measure time to within 0.45 nanosecond over a span of 12 hours