Perforation (oil well)
WordNet

noun


(1)   The act of punching a hole (especially a row of holes as for ease of separation)
(2)   A line of small holes for tearing at a particular place
(3)   A hole made in something
"A perforation of the eardrum"
WiktionaryText

Noun


  1. the act of perforating or the state of being perforated
  2. any opening in a solid object
  3. 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. that portion of a surface that remains after an open disk is removed from it
 
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