test-fly

verb
\ˈtest-ˌflī \
test-flew\ˈtest-ˌflü \; test-flown\ˈtest-ˌflōn \; test-flying

Definition of test-fly 

transitive verb

: to subject to a flight test test-fly an experimental plane

First Known Use of test-fly

1936, in the meaning defined above

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The first known use of test-fly was in 1936

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