sessionman

[ sesh-uh n-man ]
/ ˈsɛʃ ənˌmæn /

noun, plural ses·sion·men.

a professional musician who does studio recording work but is not a member of an established performing group.

Origin of sessionman

First recorded in 1955–60; session + man1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019