upbow

up +‎ bow

upbow (plural upbows)

1. (music) A note performed on a string instrument by drawing the bow upward or to the left across the instrument, moving the point of contact from the bow's tip toward the frog.

upbow (third-person singular simple present upbows, present participle upbowing, simple past and past participle upbowed)

1. (geology) To bend or arc upwards.
   • 1960, Edward Wisser, Relation of Ore Deposition to Doming in the North American Cordillera, page 45:

     In terms of the mechanics postulated above, this late deformation cycle started with upbowing of the anticlinal axis to produce the cross joints. Continued upbowing instigated persistent movement along these fractures.