pre·a·tom·ic 
(prē′ə-tŏmĭk)
(prē′ə-tŏmĭk)adj.
Of or belonging to the time before the use of, existence of, or capability for atomic energy or weapons.
- downstater
- downstream
- downswing
- Down syndrome
- down the drain
- down the hatch
- down the line
- down the road
- down the tube
- down the tubes
- down the tubes/tube
- down the wind
- downtick
- downtime
- down-to-earth
- down to the wire
- downtown
- downtrend
- downtrodden
- downturn
- down under
- downward
- downwardly
- downwash
- downwind