the act of furnishing an equivalent person or thing in the place of another | the atomic weight of an element that has the same combining capacity as a given weight of another element; the standard is 8 for oxygen |
a person or thing that takes or can take the place of another | a person or thing equal to another in value or measure or force or effect or significance etc |
an event in which one thing is substituted for another | |
a person who follows next in order | |
someone who takes the place of another person | |
filling again by supplying what has been used up | |