1. A numbered main or principal road

Encyclopedia: A road

• apophasis
• apophatic
• apophatism
• apophthegm
• apophyge
• apophyllite
• apophyseal
• apophysis
• apoplectic
• apoplectiform
• apoplectoid
• apoplexy
• apoptosis
• aporia
• Aporocactus
• Aporocactus flagelliformis
• aport
• aposelene
• aposematic
• aposematic coloration
• aposiopesis
• aposiopetic
• apostasy
• apostate
• apostatise