expert witness

American  

noun

1. a person, as a physician, who provides testimony at a legal proceeding in the form of professional opinions.

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Example Sentences

Many of the same expert witnesses testified in both trials, which sought to show Meta knew young kids used its products and designed them in ways that left those children exposed to harm.

From Los Angeles Times

Two other expert witnesses, the former State Pathologist for Northern Ireland Professor Jack Crane and forensic pathologist Nathanial Cary, also gave evidence on Tuesday.

From BBC

Johnson has been an advocate of Kory’s for years, calling the doctor as an expert witness in two 2020 Senate hearings.

From Salon

As an expert witness, my role has been to bring the experiences of this continent’s first peoples into legal proceedings where their rights as tribal citizens and as Americans were being challenged.

From Salon

A federal judge dismissed the case, saying research from the parents' expert witnesses was not conclusive.

From BBC