REPLACEMENT
replacement, replacing
(noun) the act of furnishing an equivalent person or thing in the place of another; “replacing the star will not be easy”
substitute, replacement
(noun) a person or thing that takes or can take the place of another
substitution, permutation, transposition, replacement, switch
(noun) an event in which one thing is substituted for another; “the replacement of lost blood by a transfusion of donor blood”
successor, replacement
(noun) a person who follows next in order; “he was President Lincoln’s successor”
surrogate, alternate, replacement
(noun) someone who takes the place of another person
refilling, replenishment, replacement, renewal
(noun) filling again by supplying what has been used up
Source: WordNet® 3.1
Etymology
Noun
replacement (countable and uncountable, plural replacements)
A person or thing that takes the place of another; a substitute.
The act of replacing something.
The removal of an edge of crystal, by one plane or more.
Synonyms
• See also substitute
Source: Wiktionary
Re*place"ment (-ment), n.
1. The act of replacing.
2. (Crystallog.)
Definition: The removal of an edge or an angle by one or more planes.
Source: Webster’s Unabridged Dictionary 1913 Edition