noctiluca
noun
noc·ti·lu·ca
ˌnäktəˈlükə
1
plural -s, obsolete : phosphor sense 2
2
capitalized [New Latin, from Latin, moon] : a genus of marine plantlike flagellates (order Dinoflagellata) that are unusually large, complex in structure, and bioluminescent and that when present in numbers are responsible for much of the phosphorescence of the sea
3
plural noctilucas
-kəz
or noctilucae -üˌsē
: any organism of the genus Noctiluca 
Word History
Etymology
New Latin, from Latin, moon, lantern, from nocti- noct- + -luca, from lucēre to shine (noun)
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