perforation

They have them now where the perforation is not visible.

Logo-rhythmic 2008

Both values were printed on the wove paper used for the other denominations then current and the perforation was the usual 12 made by single-line machines.

The Stamps of Canada Bertram William Henry Poole 1918

The perforation was the regulation gauge of 12, which has been in continuous use since 1858, and, as the _Philatelic Record_ stated when first chronicling the issue, "many of the stamp are badly centered, a characteristic defect of the American Bank Note Company's work."

The Stamps of Canada Bertram William Henry Poole 1918

The perforation is the usual 12 and specimens are known entirely imperforate.

The Stamps of Canada Bertram William Henry Poole 1918

When the peritoneum is eaten through it is called perforation, for it means that there is an opening into the peritoneal cavity, and, unless the cavity is cut into, cleaned and properly drained death will take place in a very short time.

Appendicitis John Henry Tilden 1895

Immediately below the aperture of the perforation is the egg chamber: a short, tunnel-shaped cavity which occupies almost the whole distance between one opening and that lying below it.

Social Life in the Insect World Jean-Henri Fabre 1869

Gastrointestinal (GI) perforation: Treatment with Avastin can result in the development of a potentially serious side effect called GI perforation, which is the development of a hole in the stomach, small intestine or large intestine.

The Earth Times Online Newspaper 2010

Gastrointestinal (GI) perforation: Treatment with Avastin can result in the development of a potentially serious side effect called GI perforation, which is the development of a hole in the stomach, small intestine or large intestine.

StreetInsider.com News Articles 2010

Gastrointestinal (GI) perforation: Treatment with Avastin can result in the development of a potentially serious side effect called GI perforation, which is the development of a hole in the stomach, small intestine or large intestine.

NewsBlaze.com Current News - Top Stories 2010

GI perforation: Treatment with Avastin can result in the development of a potentially serious side effect called GI perforation, which is the development of a hole in the stomach, small intestine or large intestine.

Business Wire Travel News 2010