hour-glass perforation

'hour-glass perforation' can also refer to...


More Like This

Show all results sharing this subject:

  • Archaeology


Show Summary Details

Quick Reference


A term used to describe the kind of hole made through a piece of stone or similarly hard material where drilling has started on two opposite faces and continued from both sides until they meet in the middle.

Subjects: Archaeology.

Reference entries

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.