1. Large deeply rooted fern of worldwide distribution with upright bipinnate compound tufted fronds
   - royal fern, royal osmund, king fern, ditch fern, Osmunda regalis

Type of: flowering fern, osmund

• bypass
• bypass capacitor
• bypass condenser
• bypast
• bypath
• byplay
• byproduct
• Byrd
• byre
• Bombina bombina
• bombinate
• bombination
• bombing
• bombing run
• bomblet
• bombora
• bombproof
• bombshell
• bombsight
• Bombus
• bombycid
• bombycid moth
• Bombycidae
• Bombycilla
• Bombycilla cedrorun