replacement

Types:: show 4 types...; hide 4 types...; novation
(law) the replacement of one obligation by another by mutual agreement of both parties; usually the replacement of one of the original parties to a contract with the consent of the remaining party; pitching change
replacing a pitcher in baseball; supersedure, supersession
act of replacing one person or thing by another especially one held to be superior; displacement, supplanting
act of taking the place of another especially using underhanded tactics

Type of:: commutation, exchange, substitution
the act of putting one thing or person in the place of another: "he sent Smith in for Jones but the substitution came too late to help"

“the replacement of lost blood by a transfusion of donor blood”

Type of:: fluctuation, variation
an instance of change; the rate or magnitude of change

Type of:: backup, backup man, fill-in, relief, reliever, stand-in, substitute
someone who takes the place of another (as when things get dangerous or difficult)

Types:: ersatz
an artificial or inferior substitute or imitation; successor
a thing or person that immediately replaces something or someone; succedaneum
(medicine) something that can be used as a substitute (especially any medicine that may be taken in place of another)

Type of:: equivalent
a person or thing equal to another in value or measure or force or effect or significance etc

Type of:: compeer, equal, match, peer
a person who is of equal standing with another in a group

DEFINITIONS OF: replacement