noctiluca

[nok-tuh-loo-kuh]
noun, plural noctilucae [nok-tuh-loo-see] .
a dinoflagellate of the genus Noctiluca, capable of producing light and, in groups, of causing a luminous appearance of the sea.

Origin:
1670–80; < Neo-Latin; Latin noctilūca shiner by night, equivalent to nocti- nocti- + -lūca shiner, derivative of lūcēre to shine

noctilucan, adjective
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World English Dictionary
noctiluca (ˌnɒktɪˈluːkə)
 
n , pl -cae
any bioluminescent marine dinoflagellate of the genus Noctiluca
 
[C17: from Latin, from nox night + lūcēre to shine]

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Example sentences
Noctiluca visibly aggregate at the sea surface as part of their life cycle and feeding strategy.
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