RhymeZone: phenethylamine definitions

Definitions of phenethylamine:

noun: (uncountable, organic chemistry) An aromatic amine which is a colorless liquid at room temperature.
noun: (countable, organic chemistry) Any of a group of compounds derived from that amine.
noun: (biochemistry) A monoamine neurotransmitter and neuromodulator found in the brain.

(Definitions from Wiktionary)