Testing of gold, silver etc; assay.
Expression: ‘With seven eyes’ – stated of someone who is alert, on the lookout.
biopsy, a medical test commonly performed by a surgeon, interventional radiologist, or an interventional cardiologist involving extraction of samplecells or tissues for examination to determine the presence or extent of a disease.
To make certain, to ensure.
To examine, scan closely, inspect, investigate. Can also mean to place something in a temporary position for a short while.
An inspection, an investigation, scrutiny.