buttonhole

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but·ton·hole

(bŭt'ŏn-hōl),
1. A short straight cut made through the wall of a cavity or canal.
2. The contraction of an orifice down to a narrow slit; that is, the so-called mitral buttonhole in extreme mitral stenosis.

buttonhole

Etymology: OFr, boton + AS, hol
a small slitlike hole in the wall of a structure or a cavity of the body.

but·ton·hole

(bŭt'ŏn-hōl)
1. A short straight cut made through the wall of a cavity or canal.
2. The contraction of an orifice down to a narrow slit; i.e., the so-called mitral buttonhole in extreme mitral stenosis.

buttonhole

(bŭt′ŏn-hōl″)
An incision (sometimes inadvertent) into the wall of a cavity or membrane. This term may be applied to surgical procedures on hollow organ systems such as the gastrointestinal, urinary tract, and cardiovascular systems and to some of myocutaneous grafts.