To make a hole in (something); to hollow.
To uncover (something) by digging.
To remove part of (something) by scooping or digging it out.
Any member of a major grouping of unicellular eukaryotes, of the clade Excavata.
To create a large hole by making a narrow groove outlining the shape of the hole and then removing the plug of material remaining by less expensive means.
To use a trepan; to trephine.
A tool used to bore through rock when sinking shafts.
A surgical instrument used to remove a circular section of bone from the skull; a trephine.