ultramicrochemistry: Meaning and Definition of

ul•tra•mi•cro•chem•is•try

Pronunciation: (ul"tru-mī"krō-kem'u-strē), [key]
— n.
  1. the branch of microchemistry dealing with minute quantities of material weighing one microgram or less.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.