Vicinal
Pronunciation : Vic"i*nal
Part of Speech : a.
Etymology : [L. vicinalis: cf. F. vicinal.]
Definition : Defn: Near; vicine. T. Warton. Vicinal planes (Min.), subordinate planes on a crystal, which are very near to the fundamental planes in angles, and sometimes take their place. They have in general very complex symbols.
Source : Webster's Unabridged Dictionary, 1913