observed

adjective

1. discovered or determined by scientific observation

- no explanation for the observed phenomena

Similar word(s): determined, ascertained, discovered

verb

1. simple past tense and past participle of observe

- Aldrichimica Acta Volume 30 No 4 (pdf) from Sigma-AldrichN-substituted pyrroles are much less reactive than the other 5-membered 1,3-dienes; no reaction was observed between N-(trimethylsilyl) pyrrole or N-benzylpyrrole with Smith’s diene (4) under thermal or high pressure (4 days at 14 kbar) conditions, even in the presence of Lewis acids.