substitution

/ ˌsʌbstɪˈtjuːʃən /

noun

1. the act of substituting or state of being substituted
2. something or someone substituted
3. maths the replacement of a term of an equation by another that is known to have the same value in order to simplify the equation
4. maths logic
   1. the uniform replacement of one expression by another
   2. an expression so derived from another

Example Sentences

It's a direct substitution of fool's gold for the real thing.

From Salon

Persuading customers that variety meats were a necessary wartime substitution worked temporarily but ultimately led to the perception that they were subpar choices.

From Salon

UCLA’s newfound depth also will free its coach to get creative with lineups and employ liberal substitution patterns, allowing his team to apply relentless pressure.

From Los Angeles Times

A suspect substitution is not the only problem to fix if England are to prevent their autumn wilting early.

From BBC

Given City's injury woes and a 58th-minute substitution in the EFL Cup on Wednesday, Foden seems certain to start and will likely play in that number 10 role that makes him so deadly.

From BBC