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

• certain
• certainly
• certainty
• certes
• Certhia
• Certhia americana
• Certhia familiaris
• Certhiidae
• certifiable
• certificate
• certificate of deposit
• certificate of incorporation
• certificate of indebtedness
• certificated
• certification
• certificatory
• certified
• certified check
• certified cheque
• certified milk
• certified public accountant
• certify
• certiorari
• certitude
• cerule