| bullweed | <botany> Knapweed. Origin: Bole a stem + weed. Source: Websters Dictionary (01 Mar 1998) |
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| bullwort | <botany> See Bishop's-weed. Source: Websters Dictionary (01 Mar 1998) |
| bully tree | <botany> The name of several West Indian trees of the order Sapotaceae, as Dipholis nigra and species of Sapota and Mimusops. most of them yield a substance closely resembling gutta-percha. Source: Websters Dictionary (01 Mar 1998) |