棘

(1)a sharp rigid animal process or appendage; as a porcupine quill or a ridge on a bone or a ray of a fish fin

(2)鋭く硬い動物の突起物または付属肢

(3)ヤマアラシの棘、骨の突起、あるいは魚のひれの鰭条など

(4)a small sharp-pointed tip resembling a spike on a stem or leaf

(5)茎や葉のとげに似た、小さくて先の鋭い先端具

(6)a dense growth of bushes

(7)低木の密生した茂み