bur


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bur

 [ber]
a form of drill used for creating openings in bone or similar hard material. Also spelled burr.
Bur. From Dorland's, 2000.

bur

(ber), This spelling is preferred to burr.
1. A rotary cutting instrument.
2. In ophthalmology, a device used to remove rust rings embedded in the cornea.
Synonym(s): burr

bur

(bur) a form of drill used for creating openings in bone or similar hard material.

bur

See burr.

burdock

Chinese medicine
A biennial herb rich in essential oils, arctiol, fukinone, volatile (acetic, butyric, isovaleric) and propionic acids, inulin (up to 50% by weight), non-hydroxyl (lauric, myristic, palmitic, and stearic) acids, polyacetylenes, tannic acid and taraxasterol; the seeds and roots are anti-inflammatory, antimicrobial, antipyretic, antitussive, diaphoretic, diuretic, expectorant and laxative. Burdock is used for abscesses, bronchitis, chickenpox, low back pain, pulmonary congestion, syphilis and urethritis; the seeds are used to treat colds, measles, sore throat and tonsillitis; the roots and leaves are used for rheumatic complaints and gout.

Herbal medicine
Burdock is used by Western herbologists internally for bacterial and fungal infections, cystitis, fever, recuperation from strokes, renal disease, as a gastrointestinal tonic, to detoxify various organs; it is used topically for skin conditions such as acne, bites, dandruff, eczema, psoriasis, gout and leprosy.

Toxicity
Burdock should not be used in pregnancy, as it stimulates uterine contraction, or in young children.

bur

(bŭr)
A rotary cutting instrument, used in dentistry, consisting of a small metal shaft and a head designed in various shapes; used at various rotational velocities to excavate decay, shape cavity forms, and reduce tooth structure.

bur

(bŭr)
A rotary cutting instrument, used in dentistry, consisting of a small metal shaft and a head designed in various shapes; used at various rotational velocities to excavate decay, shape cavity forms, and reduce tooth structure.

bur,

n a rotary cutting instrument of steel or tungsten carbide, supplied with cutting heads of various shapes.
bur, carbide,
n a bur made of tungsten carbide; used at high rotational speeds.
bur, crosscut,
n a bur with blades slotted perpendicularly to the axis of the bur.
bur, end-cutting,
n a bur that has cutting blades only on the end of its head.
bur, excavating,
n a bur used to remove dentin and debris from a cavity.
bur, finishing,
n a bur with numerous fine-cutting blades placed close together; used to contour metallic restorations.
bur, inverted cone,
n a bur with a head shaped like a truncated cone, the larger diameter being at the terminal (distal) end.
bur, plug-finishing,
n See bur, finishing.
bur, round,
n a bur with a sphere-shaped head.
bur, straight fissure,
n a bur without crosscuts that has a cylindrical head.
bur, tapered fissure,
n a bur having a long head with sides that converge from the shank to a blunt end.

bur

a surgical instrument used to ream out the lining of a cavity, for example the lateral ventricle of horses in the operation for roaring, or to debride bone or teeth. A long stem with a round or oval head carrying rasp-like teeth. See also burr.

finishing bur
for shaping and smoothing composite or amalgam when used for filling teeth.
References in periodicals archive ?
The champion bur oak is a living connection to the now lost and mostly forgotten Bluegrass Plain savanna, a relic plant community produced by the last ice age and maintained by browsing deer and elk and the thundering hooves of great bison herds.
Having grown up five miles from the national champion bur oak, this land is part of my being.
The bur oak is still holding onto most of its leaves, but all the acorns have fallen.
But this ancient bur oak has seen hundreds of autumns and annually responds the same way--with a crop of acorns that promises a return to majesty.
Last year we almost lost one of our other big bur oaks to construction, but I nominated it for the Nashville Tree Foundation's annual Big Old Tree contest, and it won
Almost round, they have a bur or mosslike fringed cap that covers at least half the nut--sort of an acorn with a bad hair day.
A mature bur oak might produce 5,000 acorns in a year with this heavy production every three to five years.
A bur oak can be magnificent on new home sites with plenty of growing room.
Remember that virtually all the bur oak's feeding roots lie within the top 4 to 6 inches of soil--exactly the same area occupied by turfgrass roots.
In its natural setting the bur oak is valued by wildlife, which seem to prefer acorns from the white oak group, to which it belongs, as did Native Americans and early settlers.