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Ⅰ.
field test UK US noun [C] (also field trial)
► a test on something such as a piece of equipment that is done in the place where it is going to be used rather than an office or a laboratory (= room used for scientific work): »
The field test was performed in conjunction with a local producer of natural gas.
Ⅱ.
field test UK US }} verb [T] (also field-test)
► to test something in the place where it is going to be used rather than an office or a laboratory: »
We publish teacher training materials that have been field tested and shown to be effective.
field-testing noun [U]
► »
The government is considering authorizing the vaccine for field-testing.
Financial and business terms. 2012.