epinephrine: a catecholamine secreted by the adrenal medulla in response to stress (trade name Adrenalin); stimulates autonomic nerve action
neurotransmitter: a neurochemical that transmits nerve impulses across a synapse
neodymium: a yellow trivalent metallic element of the rare earth group; occurs in monazite and bastnasite in association with cerium and lanthanum and praseodymium