bass clef

[beys] /beɪs/
noun, Music.
1.
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.
Origin
1900-05
British Dictionary definitions for bass clef

bass clef

/beɪs/
noun
1.
the clef that establishes F a fifth below middle C on the fourth line of the staff bass_clef Also called F clef