1. Shaped like a spine or thorn
   - acanthous, spinous

See also: pointed

• Afro-Caribbean
• Afro-wig
• Afroasiatic language
• Afrocarpus
• Afrocarpus falcata
• afropavo
• acorn squash
• acorn tube
• acorn-shaped
• Acorus
• Acorus calamus
• acousma
• acoustic
• acoustic aphasia
• acoustic buoy
• acoustic delay line
• acoustic device
• acoustic gramophone
• acoustic guitar
• acoustic impedance
• acoustic meatus
• acoustic modem
• acoustic nerve
• acoustic phenomenon
• acoustic power