You searched for: “perforation
perforation
1. The act of boring or piercing through a part.
2. A hole made through a part or substance.
3. The act of punching a hole; especially, a row of holes as for ease of separation.
4. A line of small holes for tearing at a particular place.
A unit related to: “perforation
(Greek: perforation, puncture, or tapping, as with an aspirator or needle)