ESA
n. countable C2 Proficiency esa
n. a test used by scientists to measure the amount or activity of a specific substance in a sample. It is common in medicine and biology to check for things like drugs or proteins.
n. an investigative procedure in medicine, pharmacology, or biology for qualitatively assessing or quantitatively measuring the presence, amount, or functional activity of a target entity.
Usage
Often used in technical or scientific contexts; can function as both a noun and a transitive verb.
Pitfall
the assay for check the bloodthe assay to check the bloodWhen used as a noun, it is typically followed by an infinitive or 'for' plus a noun phrase, not 'for' plus a base verb.