This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Resembling a spine or thorn.

adj. Having spines or similar projections; spiny.

adj. Having many spines.

adj. Of a person, difficult to deal with, prickly.

adj. Of a subject, providing many difficulties, thorny.

adj. Spinose; thorny.

adj. Having the form of a spine or thorn; spinelike.

In zoology and anatomy:

Having spines; spiny; spinigerous or spiniferous.

Shaped like a spine; spiniform; having the character of a spine; sharp or pointed: as, a spinous process of bone. See spinose.

In botany, same as spinose.

adj. shaped like a spine or thorn

adj. having spines

"If I had so sweet a place, I would plant brambles, briers, blackthorn, furze, crataegus, every kind of spinous growth, inside my gates, and never let anybody lop them."

pointed   

spinous spider-crab    spinous shark    spinous foramen    spinous process of the sphenoid    spinous process of a vertebra    spinous rat   

spinose    thorny    spinelike    spine   

hook-like    anterior-posterior    cost-prohibitive    tail-like    tegmental    solanaceous    pine-covered    mako    suprapubic    notochord