Trial lens
trial lens n.
Any of a set of cylindrical and spherical lenses used in testing vision.
Read Also:
- Triallist
noun 1. a person who takes part in a competition, esp a motorcycle trial 2. (sport) a person who takes part in a preliminary match or heat held to determine selection for an event, a team, etc
- Trial-marriage
noun 1. an arrangement by which a couple live together for a period of time to see if they are compatible for marriage.
- Trialogue
noun 1. a discussion or conversation in which three persons or groups participate.
- Trial-run
noun 1. a preliminary performance or test of something, as of the operation of a ship or the effectiveness of a play. noun 1. a test drive in a vehicle to assess its performance 2. a test or rehearsal of something new or untried to assess its effectiveness
- Trials and tribulations
Tests of one’s patience or endurance, as in She went through all the trials and tribulations of being admitted to law school only to find she couldn’t afford to go. This redundant expression—trial and tribulation here both mean the same thing—is also used semi-humorously, as in Do you really want to hear about the trials […]