From The Collaborative International Dictionary of English v.0.48:
Spiny \Spin"y\, a. [From Spine.]
1. Full of spines; thorny; as, a spiny tree.
[1913 Webster]
2. Like a spine in shape; slender. "Spiny grasshoppers sit
chirping." --Chapman.
[1913 Webster]
3. Fig.: Abounding with difficulties or annoyances.
[1913 Webster]
The spiny deserts of scholastic philosophy. --Bp.
Warburton.
[1913 Webster]
Spiny lobster. (Zool.) Same as Rock lobster, under
Rock. See also Lobster.
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Spiny \Spin"y\, n.
See Spinny.
[1913 Webster]