VICINAL
vicinal
(adjective) belonging to or limited to a vicinity
Source: WordNet® 3.1
Etymology
Adjective
vicinal (not comparable)
Of or pertaining to a neighborhood; neighboring.
(chemistry) Describing identical atoms or groups attached to nearby (especially adjacent) atoms in a molecule.
(mineralogy) Describing subordinate planes on a crystal, which are very near to the fundamental planes in angles, and sometimes take their place.
Source: Wiktionary
Vic"i*nal, a. Etym: [L. vicinalis: cf. F. vicinal.]
Definition: 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 Edition