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precursor [prɪ'kɜ:sə] n
chem.	precursor al drogurilor
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 : 10 phrases in 4 subjects

Chemistry	4
Commerce	1
Environment	2
General	3