WordWeb Online

1. Having spines
   "the dorsal fin is spiny"
   - spinous
    
2. Having or covered with protective barbs or quills or spines or thorns or setae etc.
   "a horse with a short spiny mane"
   - barbed, barbellate, briary, briery, bristled, bristly, burred, burry, prickly, setose, setaceous, thorny

Derived forms: spiniest, spinier

See also: armed, spininess

Encyclopedia: Spiny