bir

adj. showing both bilateral and radial symmetry. some sea anemones are biradial. [ WordNet 1.5 ]

{ } a. [ Pref. bi- + radiate. ] Having two rays; as, a biradiate fin. [ 1913 Webster ]

a. [ Pref. bi- + ramous. ] (Biol.) Having, or consisting of, two branches. [ 1913 Webster ]

v. t. [ imp. & p. p. Birched p. pr. & vb. n. Birching. ] To whip with a birch rod or twig; to flog. [ 1913 Webster ]

a. Of or pertaining to the birch; birchen. [ 1913 Webster ]

n.; pl. Birches [ OE. birche, birk, AS. birce, beorc; akin to Icel. björk, Sw. björk, Dan. birk, D. berk, OHG. piricha, MHG. birche, birke, G. birke, Russ. bereza, Pol. brzoza, Serv. breza, Skr. bhūrja. √254. Cf. 1st Birk. ] 1. A tree of several species, constituting the genus Betula; as, the white or common birch (Betula alba) (also called silver birch and lady birch); the dwarf birch (Betula glandulosa); the paper or canoe birch (Betula papyracea); the yellow birch (Betula lutea); the black or cherry birch (Betula lenta). [ 1913 Webster ]

2. The wood or timber of the birch. [ 1913 Webster ]

3. A birch twig or birch twigs, used for flogging. [ 1913 Webster ]

☞ The twigs of the common European birch (B. alba), being tough and slender, were formerly much used for rods in schools. They were also made into brooms. [ 1913 Webster ]

The threatening twigs of birch. Shak. [ 1913 Webster ]

4. A birch-bark canoe. [ 1913 Webster ]

Birch of Jamaica, a species (Bursera gummifera) of turpentine tree. --
Birch partridge. (Zool.) See Ruffed grouse. --
Birch wine, wine made of the spring sap of the birch. --
Oil of birch. (a) An oil obtained from the bark of the common European birch (Betula alba), and used in the preparation of genuine (and sometimes of the imitation) Russia leather, to which it gives its peculiar odor. (b) An oil prepared from the black birch (Betula lenta), said to be identical with the oil of wintergreen, for which it is largely sold. [ 1913 Webster ]

n. a canoe made with the bark of a birch tree.
Syn. -- birchbark canoe. [ WordNet 1.5 ]

a. Of or relating to birch. [ 1913 Webster ]

He passed where Newark's stately tower
Looks out from Yarrow's birchen bower. Sir W. Scott. [ 1913 Webster ]