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

See also: pointed, spine

Antonym: spineless

• side of meat
• side of pork
• side order
• side pocket
• side road
• side street
• side view
• side yard
• side-blotched lizard
• side-glance
• side-look
• side-to-side
• side-wheeler
• side-whiskers
• sidearm
• sideband
• sidebar
• sideboard
• sideburn
• sidecar
• sidehill
• sidekick
• sidelight
• sideline
• sidelong