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precursor [prɪ'kɜ:sə] n
gen.	dianteiro; que precede
chem.	precursor de drogas
pharma., chem.	precursor
precursors seismic n
earth.sc.	sismos preliminares
English thesaurus
precursor [prɪ'kɜ:sə] abbr.
abbr., el.	gas source used in the CVD reaction; liquid source used in the CVD reaction
USA	forerunner (a sign of something that is going to happen Val_Ships)

precursor: 37 phrases in 12 subjects

Chemistry	5
Commerce	1
Earth sciences	5
Environment	3
General	7
Health care	5
Industry	1
Law	2
Life sciences	3
Medical	2
Pharmacy and pharmacology	2
Social science	1