phase ii is a noun meaning "a clinical trial on more persons than in phase I; intended to evaluate the efficacy of a treatment for the condition it is intended to treat; possible side effects are monitored". It carries one recorded sense.
a clinical trial on more persons than in phase I; intended to evaluate the efficacy of a treatment for the condition it is intended to treat; possible side effects are monitored
Definitions, synonyms and semantic relations for phase ii come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.