1. Having spines
   "the dorsal fin is spinous"
   - spiny 
2. Shaped like a spine or thorn
   - acanthoid, acanthous

See also: pointed, spine

Antonym: spineless

• Athapaskan language
• athar
• Atharva-Veda
• atheism
• atheist
• atheistic
• atheistical
• atheling
• Athelstan
• Athena
• athenaeum
• Athene
• Athene noctua
• atheneum
• Athenian
• Athens
• Atherinidae
• Atherinopsis
• Atherinopsis californiensis
• atherodyde
• atherogenesis
• atheroma
• atheromatic
• atheromatous
• atherosclerosis