American Heritage® Dictionary of the English Language, Fourth
Edition - n. A substance produced by metabolism. - n. A
substance necessary for or taking part in a particular metabolic
process. Century Dictionary and Cyclopedia - n. A product of or
substance resulting from metabolism, especially from retrograde
metabolism, or catabolism. GNU Webster's 1913 - n. (Physiol
Chem.) A product of metabolism; a substance produced by
metabolic action, as urea. - n. any substance involved in
metabolism (either as a product of metabolism or as necessary
for metabolism) - From metabolism + -ite. (Wiktionary) -
metabol(ism) + -ite1. (American Heritage® Dictionary of the
English Language, Fourth Edition) “First they took cerebral
spinal fluid from 132 juvenile rhesus monkeys and analyzed it
for a serotonin metabolite, called 5-HIAA, that’s considered a
reliable indicator of how much serotonin the nervous system is
processing.” “For example, phenoxybenzamine (Dibenzyline®), a
drug given to relieve hypertension, is biotransfor