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adj. spin·i·er, spin·i·est
1. Bearing or covered with spines, thorns, or similar stiff projections.
2. Shaped like a spine.

spin′i·ness n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.spininess - the quality of being covered with prickly thorns or spines
raggedness, roughness - a texture of a surface or edge that is not smooth but is irregular and uneven