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bur 音標拼音: [b'ɚ] n. 刺果,粘附物 刺果,粘附物 bur n 1: seed vessel having hooks or prickles [ synonym: { bur}, { burr}] 2: small bit used in dentistry or surgery [ synonym: { bur}, { burr}] v 1: remove the burrs from [ synonym: { bur}, { burr}] Bur \ Bur\, Burr \ Burr\ ( b[^ u] r), n. [ OE. burre burdock; cf. Dan. borre, OSw. borra, burdock, thistle; perh. akin to E. bristle ( burr- for burz-), or perh. to F. bourre hair, wool, stuff; also, according to Cotgrave, " the downe, or hairie coat, wherewith divers herbes, fruits, and flowers, are covered," fr. L. burrae trifles, LL. reburrus rough.] 1. ( Bot.) Any rough or prickly envelope of the seeds of plants, whether a pericarp, a persistent calyx, or an involucre, as of the chestnut and burdock; a seed vessel having hooks or prickles. Also, any weed which bears burs. [ 1913 Webster] Amongst rude burs and thistles. -- Milton. [ 1913 Webster] Bur and brake and brier. -- Tennyson. [ 1913 Webster] 2. The thin ridge left by a tool in cutting or shaping metal. See { Burr}, n., 2. [ 1913 Webster] 3. A ring of iron on a lance or spear. See { Burr}, n., 4. [ 1913 Webster] 4. The lobe of the ear. See { Burr}, n., 5. [ 1913 Webster] 5. The sweetbread. [ 1913 Webster] 6. A clinker; a partially vitrified brick. [ 1913 Webster] 7. ( Mech.) ( a) A small circular saw. ( b) A triangular chisel. ( c) A drill with a serrated head larger than the shank; -- especially a small drill bit used by dentists. [ 1913 Webster] 8. [ Cf. Gael. borr, borra, a knob, bunch.] ( Zool.) The round knob of an antler next to a deer' s head. [ Commonly written { burr}.] [ 1913 Webster] { Bur oak} ( Bot.), a useful and ornamental species of oak ({ Quercus macrocarpa}) with ovoid acorns inclosed in deep cups imbricated with pointed scales. It grows in the Middle and Western United States, and its wood is tough, close- grained, and durable. { Bur reed} ( Bot.), a plant of the genus { Sparganium}, having long ribbonlike leaves. [ 1913 Webster]
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