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but·ton

(bŭt'ŏn),
A knob-shaped structure, lesion, or device.
[M.E., fr. O.Fr. bouton, fr. bouter, to thrust, fr. Germanic]

button

/but·ton/ (but´'n)
1. a knoblike elevation or structure.
2. a spool- or disk-shaped device used in surgery for construction of intestinal anastomosis.

Jaboulay button  a device used for lateral intestinal anastomosis.
mescal buttons  transverse slices of the flowering heads of a Mexican cactus, Lophophora williamsii, whose major active principle is mescaline.
Murphy's button  a metallic device used for connecting the ends of a divided intestine.
skin button  a connector or stretch of tubing covered with a velour fabric, designed to encourage tissue ingrowth where it passes through the skin.

button

[but′ən]
Etymology: OFr, boton
1 a knoblike elevation or structure.
2 a small appliance shaped like a spool or disk, used in surgery for construction of an intestinal anastomosis.

button

Drug slang
A regional term for mescaline.

Radiation safety
A hockey puck-like mass of plutonium nitrate which is a starting material for bomb-grade plutonium.
 
Transfusion medicine
An aggregate of red blood cells (RBCs) adherent to the bottom of a test tube after centrifugation; if with gentle shaking of the test tube the cells remain adherent, agglutination is assumed to have occurred, implying presence of both an antigen (on the RBCs) and a specific antibody (immunoglobulins) in the serum button.
 
Vox populi
See Panic button.

but·ton

(bŭt'ŏn)
A structure, lesion, or deviceof knob shape.
[M.E., fr. O.Fr. bouton, fr.bouter, to thrust, fr. Germanic]

button 

The preformed piece of glass which will become the segment of a fused bifocal or multifocal lens. It is ground and polished on one side to the appropriate curvature for fusing to the main lens (British Standard). See bifocal lens.

but·ton

(bŭt'ŏn)
A structure, lesion, or device of knob shape.
[M.E., fr. O.Fr. bouton, fr. bouter, to thrust, fr. Germanic]

button,

n the excess metal remaining from the casting and sprue; located at the end of the sprue, opposite the casting.
button, implant,

button

1. a knoblike elevation or structure.
2. an appliance used in surgical anastomosis of the intestine (Murphy's button).

button tumor
button ulcer
craterous mucosal defects, the edges of which are raised above the surrounding mucosa. The original necrotic center of the lesion is shed leaving a deep ulcer. They are characteristic lesions in the cecum and colon of pigs with subacute salmonellosis. The lesions are usually few in number, small and deep.
References in periodicals archive ?
The Tweener Button offers the perfect middle place for every man's everyday dressing dilemma: to look too uptight and buttoned up or too exposed and casual.
But buttons have a long and fascinating history and were once an outward sign of one's social position since you could tell a person's status by a glance at his buttons - the nobs went about in the latest thing which could mean painted miniatures set in brilliant pastes, while the hoy polloi buttoned up against the cold March winds with cut-steel copies or cheap pewter discs.
If buttoned cuff openings are too small to get your fist through, either move the buttons to make the opening larger and/or sew the buttons on with elastic thread.