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(British spelling) (Canadian spelling, common) present participle and gerund of trial examples
usually uncountable, plural triallings
The process of running a trial; an experiment or pilot. quotations examples
Barker's proposal to try out new equipment before mass introduction should also have been heeded, because traction components bought without trialling for the Glasgow and Great Eastern schemes gave trouble.
2020 July 29, David Clough, “AC/DC: the big switch in power supply”, in Rail, page 65
The running of trial races, especially for horses or greyhounds. examples