1. Yellow-green fern of rocky areas of northern hemisphere
   - northern oak fern, Gymnocarpium robertianum

Derived forms: limestone ferns

Type of: fern

• aposematic
• aposematic coloration
• aposiopesis
• aposiopetic
• apostasy
• apostate
• apostatise
• apostatize
• Apostelic Father
• apostille
• apostle
• Apostle of Germany
• Apostle of the Gentiles
• Apostle Paul
• apostleship
• apostolate
• apostolic
• apostolic delegate
• apostolical
• apostrophe
• apostrophic
• apostrophise
• apostrophize
• apothecaries' ounce
• apothecaries' pound