That which remains after removal of one or more substances. SYN: residuum. [L. residuum]
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res·i·due 'rez-ə-.d(y)ü n something that remains after a part is taken, separated, or designated specif a constituent structural unit (as a group or monomer) of a usu. complex molecule <amino acid \residues in a protein>
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res·i·due (rezґĭ-doo) [L. residuum, from re- back + sidere to sit] 1. a remainder; that which remains after the removal of other substances. 2. in biochemistry, the portion of a molecule that remains after it has lost some of its components, such as an amino acid residue.Medical dictionary. 2011.