any of the blue-green algae of the genus Spirulina, sometimes added to food for its nutrient value.

< Neo-Latin, equivalent to spīrul(a) small coil (see spiral, -ule) + -ina -ina; so called from their corkscrew shape

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World English Dictionary
spirulina (ˌspɪrʊˈlaɪnə, -ˈliːnə)
any filamentous cyanobacterium of the genus Spirulina: processed as a valuable source of proteins and other nutrients
[from New Latin spirula small spiral]

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The greenest of green drinks on our list: spinach, spirulina, broccoli and parsley is masked by green apple and kiwi juice.
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