Definition of "perforations" [perforations]

• Plural form of perforation. (noun)

Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License

• "The gill slits occur with a modification due to the slitting and flattening out of the embryo, already insisted upon; for, whereas in the tadpole they may be described as perforations, in the fowl they appear as four notches between ingrowing processes that are endeavouring to meet in the middle line."
• "Each one of the perforations is the entrance to an oblique tunnel, which is bored in the medullary sheath of the twig."
• "St. Jude said in its own monitoring of the Riata's performance, it hasn't seen anything to suggest Riata leads are linked to more heart "perforations" than are any other defibrillator leads."