from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of a group of organic compounds, such as spermine and spermidine, composed of only carbon, nitrogen, and hydrogen and containing two or more amino groups.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. any compound having many (more than three) amino functional groups; especially such compounds formed by decomposition of proteins
From poly- + amine (Wiktionary)