7. (Mech.) (a) A small circular saw. (b) A triangular chisel. (c) A drill with a serrated head larger than the shank; -- used by dentists.
8. [Cf. Gael. borr, borra, a knob, bunch.] (Zoöl.) The round knob of an antler next to a deer's head. [Commonly written burr.]
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.
Bur"bolt` (&?;), n. A birdbolt. [Obs.] Ford.
Bur"bot (&?;), n. [F. barbote, fr. barbe beard. See 1st Barb.] (Zoöl.) A fresh- water fish of the genus Lota, having on the nose two very small barbels, and a larger one on the chin. [Written also burbolt.]
The fish is also called an eelpout or ling, and is allied to the codfish. The Lota vulgaris is a common European species. An American species (L. maculosa) is found in New England, the Great Lakes, and farther north.
Bur`de*lais" (&?;), n. [F. bourdelais, prob. fr. bordelais. See Bordelais.] A sort of grape. Jonson.
Bur"den (bû"d'n), n. [Written also burthen.] [OE. burden, burthen, birthen, birden, AS. byrðen; akin to Icel. byrði, Dan. byrde, Sw. börda, G. bürde, OHG. burdi, Goth. baúrþei, fr. the root of E. bear, AS. beran, Goth. bairan. √92. See 1st Bear.] 1. That which is borne or carried; a load.
Plants with goodly burden bowing.
Shak.
2. That which is borne with labor or difficulty; that which is grievous, wearisome, or oppressive.
Deaf, giddy, helpless, left alone,
To all my friends a burden grown.
Swift.
3. The capacity of a vessel, or the weight of cargo that she will carry; as, a ship of a hundred tons burden.