'Vicinal planes' definitions:

Definition of 'Vicinal planes'

From: GCIDE
  • Vicinal \Vic"i*nal\ (?; 277), a. [L. vicinalis: cf. F. vicinal.]
  • 1. Near; vicine. --T. Warton. [1913 Webster]
  • 2. (Organic Chem.) Having the substituted groups on the same carbon atom. [PJC]
  • 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. [1913 Webster]