Consultant

n. advisor, counselor

A consultant (from the Latin consultare means "to discuss" from which we also derive words such as consul and counsel) is a professional who provides advice in a particular area of expertise such as accountancy, the environment, technology, law, human resources, marketing, medicine, finance, public affairs, communication, engineering, graphic design, or waste management.
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Noun
1. an expert who gives advice; "an adviser helped students select their courses"; "the United States sent military advisors to Guatemala"
(synonym) adviser, advisor
(hypernym) authority
(hyponym) amicus curiae, friend of the court
(derivation) consult

adj. consulting

n. consultant, advisor

v. consult, advise, counsel, search

n. consultant, advisor, counselor