adj. Of or pertaining to a neighborhood; neighboring.
adj. Describing identical atoms or groups attached to nearby (especially adjacent) atoms in a molecule.
the GNU version of the Collaborative International Dictionary of English
adj. Near; vicine.
adj. Having the substituted groups on the same carbon atom.
The Century Dictionary and Cyclopedia
In organ. chem., noting the proximity, in the molecule of a cyclic compound, of two or more substituting groups or atoms. It is used especially of derivatives of benzene having groups in the positions 1,2,3.
Near; neighboring. [Rare.]
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. belonging to or limited to a vicinity
Word Usage
"A people has, therefore, a twofold location, an immediate one, based upon their actual territory, and a mediate or vicinal one, growing out of its relations to the countries nearest them."