locant
Noun. (organic chemistry) That part of the name of a compound (often a letter or number) that describes the position of an atom, residue or functional group e.g. the ''2'' in ''hexan-2-one''.This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.
This entry was last updated on RefTopia from its source on 3/20/2012.