The blunting of one end by use calls for no explanation, but the purpose of the perforation is a little obscure.
Some of both these values were issued with perforation late in 1857 or early in 1858.
Peritonitis may arise secondary to the enteric edema, or by perforation of the stomach or intestines by a gangrenous spot.
The perforation is the usual 12 and specimens are known entirely imperforate.
There was no marked congestion or hemorrhage or perforation.
The raising of the margins of the notch suggests a perforation.
A perforation may also be situated close to the anterior nares without even making its presence known.
This perforation is neatly made and about one-eighth of an inch in diameter.
Sometimes it takes place as the result of a perforation of the duodenum.
The axis and perforation are at right angles to the plane of lamination.
early 15c., "hole made through something;" mid-15c., "action of perforating," from Middle French perforation or directly from Late Latin perforationem (nominative perforatio), noun of action from past participle stem of Latin perforare "bore or pierce through," from per- "through" (see per) + forare "to pierce" (see bore (v.1)).
perforation per·fo·ra·tion (pûr'fə-rā'shən)
The act of perforating or the state of being perforated.
An abnormal opening in a hollow organ or viscus, as one made by rupture or injury.