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English thesaurus
atom per cent
abbr., polym.	ao
chem., abbr.	a/o
mater.sc.	at.% (MichaelBurov)

atom: 85 phrases in 15 subjects

Antennas and waveguides	2
Astronomy	3
Chemistry	16
Communications	2
Earth sciences	25
Electronics	21
Environment	1
General	3
Industry	1
Information technology	1
Medical	2
Microsoft	1
Physical sciences	5
Polymers	1
Technology	1