A directive to string musicians to perform the indicated passage with the part of the bow near the frog, or heel of the bow.
See also [Eng.] at the frog; [Eng.] at the heel; [Fr.] du talon (m); [Fr.] à la hausse (f); [Fr.] au talon (m); [Ger.] am Frosch (m); [It.] al tallone (m).
Video example: Sharon Polifrone, Assistant Concertmaster, Lyric Opera Orchestra, Chicago, Illinois