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Definition of: echinus
(i·kī′nəs) noun plural ·ni (-nī)
1. Archit. The cushion of the capital of a Doric column, or the corresponding part in some other order. For illustration see under CAPITAL.
2. A sea urchin or echinoid.
3. A hedgehog. [<L <Gk. echinos hedgehog, sea urchin]
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