a. [ L. antelucanus; ante + lux light. ] Held or being before light; -- a word applied to assemblies of Christians, in ancient times of persecution, held before light in the morning. “Antelucan worship.” De Quincey. [ 1913 Webster ]

n. (Mining) Soft clayey matter in the vein, or surrounding it. [ Written also flookan, flukan, and fluccan. ] [ 1913 Webster ]

a. (Anat.) Of or pertaining to the hallux. [ 1913 Webster ]

v. t. [ L. interlucatus, p. p. of interlucare; inter between + lux, lucis, light. ] To let in light upon, as by cutting away branches. [ Obs. ] [ 1913 Webster ]

n. [ L. interlucatio. ] Act of thinning a wood to let in light. [ Obs. ] Evelyn. [ 1913 Webster ]

‖n. [ F., fr. L. lucerna a lamp. See Luthern. ] (Arch.) A dormer window. [ 1913 Webster ]

‖n.; pl. Noctilucae [ 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. [ 1913 Webster ]

2. (Zool.) 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 Noctilucae. [ 1913 Webster ]