burr

noun

1. a rough edge or ridge left on metal or other material by cutting or drilling
2. a washer on the small end of a rivet
3. bur (senses , , & )

Etymology: var. of bur

transitive verb

1. to form a rough edge on
2. to remove burrs from (metal)

noun

1. the trilling of r, with uvula or tongue, as in the dialectal speech of northern England and Scotland
2. a whirring sound

Etymology: prob. echoic

intransitive verb

1. to speak with a burr
2. to make a whir

transitive verb

to pronounce with a burr

noun

buhrstone

Burr, Aaron 1756-1836; U.S. political leader: vice president of the U.S. (1801-05): killed Alexander Hamilton in a duel (1804)