n. Any compound containing two amino functional groups.
the GNU version of the Collaborative International Dictionary of English
n. A compound containing two amido groups united with one or more basic or positive radicals, -- as contrasted with a diamide.
The Century Dictionary and Cyclopedia
n. The name of a class of chemical compounds formed by substituting one or more alcohol radicals for hydrogen in a double molecule made up of two ammonia molecules.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. any organic compound containing two amino groups
Word Usage
"_Brucine_ is a tertiary diamine, that is, formed by substitution in a double ammonia molecule."