| birch |
hard close-grained wood of any of various birch trees; used especially in furniture and interior finishes and plywood any betulaceous tree or shrub of the genus Betula having a thin peeling bark whip with a birch twig consisting of or made of wood of the birch tree a switch consisting of a twig or a bundle of twigs from a birch tree; used to hit people as punishment; "my father never spared the birch"
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| bird louse |
wingless insect with mouth parts adapted for biting; mostly parasitic on birds
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| bird's foot trefoil |
Old World herb related to fenugreek European forage plant having claw-shaped pods introduced in America
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| biramous |
bifurcate: resembling a fork; divided or separated into two branches; "the biramous appendages of an arthropod"; "long branched hairs on its legson which pollen collects"; "a forked river"; "a forked tail"; "forked lightning"; "horseradish grown in poor soil may develop prongy roots"
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| birefringence |
double refraction: splitting a ray into two parallel rays polarized perpendicularly
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