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Amman
AMME
Ammeter
ammine
ammino
Ammiral
Ammite
ammo
ammobium
Ammobium alatum
Ammodyte
Ammodytes
Ammodytidae
Ammonal
Ammonia
ammonia alum
-- ammonia clock --
ammonia water
Ammoniac
ammoniacal
Ammoniacal engine
Ammoniacal fermentation
ammoniate
Ammoniated
Ammonic
ammonification
ammonify
Ammonite
ammonitic
Ammonitiferous
Ammonitoidea
Ammonium
ammonium alum
ammonia clock
Noun
1.
ammonia clock
-
an
atomic
clock
based
on
vibrational
frequency
of
the
nitrogen
atom
in
the
ammonia
molecule
atomic
clock
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