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.
To make porous or permeable through the formation of small holes or tunnels.
A location in a monitor program containing the address of a routine, allowing the user to substitute different functionality.
A hole burrowed by a worm.
A hypothetical shortcut between two points in spacetime, permitting faster-than-light travel and sometimes time travel.