Main Entry: res·i·due

Pronunciation: \ˈre-zə-ˌdü, -ˌdyü\

Function: noun

Etymology: Middle English, from Anglo-French, from Latin residuum, from neuter of residuus left over, from residēre to remain

Date: 14th century

: something that remains after a part is taken, separated, or designated or after the completion of a process : remnant, remainder: as a : the part of a testator's estate remaining after the satisfaction of all debts, charges, allowances, and previous devises and bequests b : the remainder after subtracting a multiple of a modulus from an integer or a power of the integer that can appear as the second of the two terms in an appropriate congruence <2 and 7 are residues of 12 modulo 5> c : a constituent structural unit (as a group or monomer) of a usually complex molecule <amino acid residues from hydrolysis of protein>