Definition

1. Noun:

   • A surgical instrument, typically a cylindrical saw, used to cut out a circular piece of bone, especially from the skull.

2. Verb:

   • To operate on or cut with a trephine; to perform trephination.

Usage Examples

• Noun:

  • The neurosurgeon selected a trephine of the appropriate diameter for the procedure.
  • Ancient forms of the trephine have been found in archaeological sites.

• Verb:

  • The surgeon had to trephine the patient's skull to relieve the pressure from a hematoma.
  • In some historical practices, they would trephine the skull to treat mental illness.

Advanced Usage

• "To perform a trephination/trephining": This is the action of using a trephine.
  • The ancient practice of trephining was surprisingly common in some cultures.

Variants and Related Words

• Trephination (n): The operation of cutting with a trephine; the hole created by a trephine.

  • Trephination is one of the oldest known surgical procedures.

• Trephining (n/gerund): The act or process of using a trephine.

Synonyms

• Noun: Trepan, surgical saw, crown saw.
• Verb: Trepan, bore, drill (in a specific surgical context).

Notes on Meaning

• Historically, "trephine" and "trepan" were used interchangeably, though "trephine" often refers to a more modern, improved version of the instrument with a central pin to prevent slipping. In contemporary medical terminology, "trephine" is the more common term for the instrument used in procedures like a corneal trephination in eye surgery or for bone grafts.

Noun

1. a surgical instrument used to remove sections of bone from the skull

Verb

1. operate on with a trephine