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sub·sti·tute
I
\\ˈsəb-stə-ˌtüt, -ˌtyüt\\ noun
 ETYMOLOGY  Middle English, from Anglo-French substitut, from Latin substitutus, past participle of substituere to put in place of, from sub- + statuere to set up, place — more at statute
 DATE  15th century
: a person or thing that takes the place or function of another
substitute adjective

II
verb
(-tut·ed ; -tut·ing)
 DATE  circa 1594
transitive verb
1.
  a. to put or use in the place of another
  b. to introduce (an atom or group) as a substituent; also : to alter (as a compound) by introduction of a substituent
      a substituted benzene ring
2. to take the place of : replace
intransitive verb
: to serve as a substitute

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