term:

Trial

trial n

[Anglo-French, from trier to try]
: a judicial examination of issues of fact or law disputed by parties for the purpose of determining the rights of the parties compare hearing, inquest

at trial
: in or during the course of a trial

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.