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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

abstraction, abstract entity go
a general concept formed by extracting common features from specific examples

psychological feature go
a feature of the mental life of a living organism

event go
something that happens at a given place and time

act, deed, human action, human activity go
something that people do or cause to happen

activity go
any specific behavior

effort, attempt, endeavor, endeavour, try go
earnest and conscientious activity intended to do or accomplish something

run, test, trial go
the act of testing something

assay go
a quantitative or qualitative test of a substance (especially an ore or a drug) to determine its components

bioassay, bio-assay
appraisal of the biological activity of a substance by testing its effect on an organism and comparing the result with some agreed standard

noun.cognition

2 Subcategories

immunoassay, immunochemical assay go
identification of a substance (especially a protein) by its action as an antigen
pregnancy test go
a physiological test to determine whether a woman is pregnant