Trephine - meaning and definition. What is Trephine
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What (who) is Trephine - definition

SURGICAL INSTRUMENT WITH A CYLINDRICAL BLADE
  • [[Dr. John Clarke]] [[trepanning]] a skull, ca. 1664, in one of the earliest American portraits. Clarke has a trephine in his right hand. The painting is in [[Harvard Medical School]].<ref>[[Holmes, Oliver Wendell]] (September 18, 2008). [http://www.gutenberg.org/ebooks/2700 ''Medical Essays''].</ref><!--What page of the book? This information is not found on the cited webpage itself.-->

Trephine         
·vt To perforate with a trephine; to Trepan.
II. Trephine ·noun An instrument for trepanning, being an improvement on the trepan. It is a circular or cylindrical saw, with a handle like that of a gimlet, and a little sharp perforator called the center pin.
trephine         
v. a.
Trepan.
trephine         
[tr?'f??n, -'fi:n]
¦ noun a hole saw used in surgery to remove a circle of tissue or bone.
¦ verb operate on with a trephine.
Derivatives
trephination ?tr?f?'ne??(?)n noun
Origin
C17: from L. tres fines 'three ends', appar. influenced by trepan.

Wikipedia

Trephine

A trephine (; from Greek trypanon, meaning an instrument for boring) is a surgical instrument with a cylindrical blade. It can be of one of several dimensions and designs depending on what it is meant to be used for. They may be specially designed for obtaining a cylindrically shaped core of bone that can be used for tests and bone studies, cutting holes in bones (e.g., the skull) or for cutting out a round piece of the cornea for eye surgery.

A cylindrically shaped core of bone (or bone biopsy) obtained with a bone marrow trephine is usually examined in the histopathology department of a hospital under a microscope. It shows the pattern and cellularity of the bone marrow as it lay in the bone and is a useful diagnostic tool in certain circumstances such as bone marrow cancer and leukemia.