2 definitions found From WordNet (r) 2.0 [wn]: acanthous adjective: shaped like a spine or thorn [syn: {acanthoid}, {spinous}] From The Collaborative International Dictionary of English v.0.44 [gcide]: acanthoid \acanthoid\ acanthous \acanthous\adj. 1. 1 shaped like a spine or thorn Syn: spinous [WordNet 1.5]

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