Crossword clues for perforation
Longman Dictionary of Contemporary English
The Collaborative International Dictionary
Perforation \Per`fo*ra"tion\, n. [Cf. F. perforation.]
The act of perforating, or of boring or piercing through.
--Bacon.A hole made by boring or piercing; an aperture. ``Slender perforations.''
--Sir T. Browne.
Douglas Harper's Etymology Dictionary
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)).
Wiktionary
n. 1 the act of perforating or the state of being perforated 2 any opening in a solid object 3 (context medicine English) an abnormal opening in an organ, such as a rupture 4 a series of holes punched through something in order to assist in separating parts 5 (context mathematics English) that portion of a surface that remains after an open disk is removed from it
WordNet
n. a line of small holes for tearing at a particular place
a hole made in something; "a perforation of the eardrum"
the act of punching a hole (especially a row of holes as for ease of separation)
Wikipedia
A perforation is a small hole in a thin material or web. There is usually more than one perforation in an organized fashion, where all of the holes are called a perforation. The process of creating perforations is called perforating, which involves puncturing the workpiece with a tool.
Perforations are usually used to allow easy separation of two sections of the material, such as allowing paper to be torn easily along the line. Packaging with perforations in paperboard or plastic film is easy for consumers to open. Other purposes include filtrating fluids, sound deadening, allowing light or fluids to pass through, and to create an aesthetic design.
Various applications include plastic films to allow the packages to breathe, medical films, micro perforated plate and sound and vapor barriers.
A perforation is a small hole in a thin material or web.
Perforation may also refer to:
- A leaf feature
- Perforation (oil well), a hole punched in the casing or liner of an oil well to connect it to the reservoir
- Perforation gauge, a term used in philately
- Film perforations, the holes placed in the film stock during manufacturing and used for transporting
- Hair perforation test, a laboratory test used to help distinguish the isolates of dermatophytes
- Hydro-slotted perforation, a process in oil and gas drilling
-
Organ perforation, a complete penetration of the wall of a hollow organ in the body, including:
- Corneal perforation
- Eardrum perforation
- Esophageal perforation
- Gastrointestinal perforation
- Nasal septum perforation
- Stercoral perforation
- Uterine perforation
Usage examples of "perforation".
Algora speaks of an abdominal pregnancy in which there was spontaneous perforation of the anterior abdominal parietes, followed by death.
She loves to appraise estate stuff, item by item, and bring out the watermarks and count the perforations and check the color charts.
The patient died the fourth day after the operation, from peritonitis, and an autopsy showed the perforation and agglutination of the two intestinal curvatures.
The sparger consists of a number of hollow arms radiating from a common centre and pierced by a number of small perforations.
Almost everything in my stocking is condoms, in boxes, in little gold foil coins, in long strips of a hundred with perforations so you can tear them apart.
Searching for something to unwind with, the medical attache tears the different padded mailers open along their designated perforations.
Cyrus Harding that he thought he ought first of all to stop the hemorrhage, but not close the two wounds, or cause their immediate cicatrization, for there had been internal perforation, and the suppuration must not be allowed to accumulate in the chest.
Unable to do more to protect her from the approaching sea of fire, he stumbled into the wheelhouse, clutching his side where one bullet had plunged into the abdominal muscle, made a small perforation in his colon and lodged in the pelvic girdle.
Using a square of tough mammoth skin as a thimble, she pushed the sharp arctic fox bone through the leather, making a small perforation.
Multiple perforations of the gut, two broken vertebrae, compound fracture of the left femur, and assorted scrapes, punctures, bruises, abrasions, and contusions.
Some have run out so far, as to fancy the Stars might be but the light of the Crystalline Heaven shot through perforations on the bodies of the Orbs.
He said I shouldn't have had three crushed ribs, a rupture of the external oblique muscle, liver hemorrhages, and a perforation from a piece of rib bone in the bottom of the left lung.
I fancied I could almost hear the ripping and tearing of the tough rubber-coated silken wings of the hydroaeroplane as the wind widened the perforation the gun had made.
Still saying nothing, he turned with an infuriating deliberation to his keyboards and began deftly punching out paper tapes, setting up the problems in patterns of perforations the machines could read.
He wore a white shirt with the sleeves rolled up, and a couple of pens shared his shirt pocket with some philatelic implements Keller recognized from decades agoa pair of stamp tongs, a magnifier, a perforation gauge.