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s.i.d.
med. once a day (лат. semel in die)
S.I.D.
abbr., earth.sc. sudden ionospheric disturbance
abbr., lat. Spiritus In Deo ("spirit rests in God")
s.i: 61 phrases in 15 subjects
Construction1
Earth sciences1
Electronics4
Foreign trade1
General24
Health care4
Informal6
Mathematics1
Mechanic engineering9
Medical3
Metallurgy1
Rude2
Skiing2
Statistics1
Transport1