bass clef

UK: /ˌbeɪsˈklɛf/ US: (bās)

WordReference Random House Unabridged Dictionary of American English © 2025

bass′ clef′  (bās), [Music.]

1. Music and Dance a symbol placed on the fourth line of a staff to indicate that the fourth line of the staff corresponds to the F next below middle C;
   F clef.

• 1900–05

Collins Concise English Dictionary © HarperCollins Publishers::

bass clef / beɪs/ noun

1. the clef that establishes F a fifth below middle C on the fourth line of the staff