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The Collaborative International Dictionary
Noctiluca

Noctiluca \Noc`ti*lu"ca\, n.; pl. Noctiluc[AE]. [L. noctiluca something that shines by night, fr. nox, noctis, night + lucere to shine, lux light.]

  1. (Old Chem.) That which shines at night; -- a fanciful name for phosphorus.

  2. (Zo["o]l.) A genus of marine flagellate Infusoria, remarkable for their unusually large size and complex structure, as well as for their phosphorescence. The brilliant diffuse phosphorescence of the sea is often due to myriads of Noctiluc[ae].

Wiktionary
WordNet
noctiluca
  1. n. large bioluminescent marine protozoan [syn: Noctiluca miliaris]

  2. [also: noctilucae (pl)]

Usage examples of "noctiluca".

An ipsitilla or even the cheapest noctiluca does not give herself for pay, any more than a lady does.

Far, far below in the blackness, a phosphorescent glimmer played to and fro, like noctilucae on an underworld ocean.