Kerf

Kerf is waste.

They pass through a cleft that has been made across a low range of hills, like a kerf in the top of a log, and enter into a lovely territory of subtly swelling emerald green fields strewn randomly with small white capsules that he takes to be sheep.

1991, Popular Mechanics, January issue, page 63, "Thin-kerf blades", by Rosario Capotostro Sawing with a thin-kerf blade produces a kerf that's 1/2 to 1/3 the size of a standard blade kerf.

1991, Popular Mechanics, January issue, page 63, "Thin-kerf blades", by Rosario Capotostro Sawing with a thin-kerf blade produces a kerf that's 1/2 to 1/3 the size of a standard blade kerf.

Sebastian, still not alone, is seated on the white-and-cinder-grey trunk of a felled tree. […] A Camberwell Beauty skims past and settles on the kerf, fanning its velvety wings.