from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A crystalline substance, C10H12N2, that is formed in plant and animal tissues from tryptophan and is an intermediate in various metabolic processes.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a heterocyclic amine found in both plant and animal tissue, where it is an intermediate in several metabolic schemes.
- n. Any of a class of neurotransmitters and psychedelic drugs derived from this compound.
trypt(ophan) + amine.(American Heritage® Dictionary of the English Language, Fourth Edition)