
1) Eyelet 2) Gap 3) Grommet 4) Hole 5) Opening
Found on
https://www.crosswordclues.com/clue/perforation

1) Hole 2) Industrial process 3) Petroleum production 4) The act of punching a hole 5) Tiny hole
Found on
https://www.crosswordclues.com/clue/perforation

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 ...
Found on
http://en.wikipedia.org/wiki/Perforation
[oil well] ==Introduction== A perforation in the context of oil wells refers to a hole punched in the casing or liner of an oil well to connect it to the reservoir. In cased hole completions, the well will be drilled down past the section of the formation desired for production and will have casing or a liner run in separating the formation...
Found on
http://en.wikipedia.org/wiki/Perforation_(oil_well)

• (n.) A hole made by boring or piercing; an aperture. • (n.) The act of perforating, or of boring or piercing through.
Found on
http://thinkexist.com/dictionary/meaning/perforation/

(L. perforare to pierce through) 1. the act of boring or piercing through a part. 2. a hole made through a part or substance.
Found on
http://users.ugent.be/~rvdstich/eugloss/DIC/dictio65.html

Another term for core.
Found on
http://www.aeroconsystems.com/glossary.htm

Series of small cuts made in labels and/or their release liner to facilitate tearing along a predetermined line.
Found on
http://www.encyclo.co.uk/local/20829

1. The act of boring or piercing through a part. ... 2. A hole made through a part or substance. ... Origin: L. Perforare = to pierce through ... (18 Nov 1997) ...
Found on
http://www.encyclo.co.uk/local/20973

(pur″fә-ra´shәn) the act of boring or piercing through a part. a hole or break in the containing walls or membranes of an organ or structure of the body, occurring when erosion, infection, or other factors create a weak spot in the organ and internal pressure causes a rupture. It also may...
Found on
http://www.encyclo.co.uk/local/21001

Perforations or brogueing refers to the holes in shoes that make an ordinary shoe look more elaborate. Originally thought to have started in Scotland where the holes allowed water to drain out of the shoes, but nowadays is used just as a decoration and to highlight.
Found on
http://www.encyclo.co.uk/local/21391

A circular opening.
Found on
http://www.encyclo.co.uk/local/22037

a hole made in the casing, cement, and formation through which formation fluids enter a wellbore. Usually several perforations are made at a time.
Found on
http://www.encyclo.co.uk/visitor-contributions.php
Per`fo·ra'tion noun [ Confer French
perforation .]
1. The act of perforating, or of boring or piercing through.
Bacon. 2. A hole made by boring or piercing; an aperture. 'Slender
perforations .'
Sir T. Browne. Found on
http://www.encyclo.co.uk/webster/P/54

An opening on a tooth or other oral structure.
Found on
http://www.jeffersondentalclinics.com/services/dental-terms.html

Type: Term Pronunciation: per′fō-rā′shŭn Definitions: 1. Abnormal opening in a hollow organ or viscus. Synonyms: tresis
Found on
http://www.medilexicon.com/medicaldictionary.php?t=66866

A hole trhat form in tissue and organs because of disease or injury
Found on
http://www.pregnology.com/

[
n] - a hole made in something 2. [n] - a line of small holes for tearing at a particular place 3. [n] - the act of punching a hole (especially a row of holes as for ease of separation)
Found on
http://www.webdictionary.co.uk/definition.php?query=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.
Found on
http://www.wordinfo.info/words/index/info/view_unit/844/

a hole in an organ or body structure caused by disease or injury
Found on
https://www.encyclo.co.uk/local/20875
noun the act of punching a hole (especially a row of holes as for ease of separation)
Found on
https://www.encyclo.co.uk/local/20974

Running a series of cuts (often very small and close together) into board to allow the two sides to be separated.
Found on
https://www.encyclo.co.uk/local/23084

a hole in the wall of an organ.
Found on
https://www.stanfordchildrens.org/en/topic/default?id=glossary---digestive-
No exact match found.