sub·stit·u·ent (s b-st ch  -nt)n. An atom, radical, or group substituted for another in a chemical compound. adj. Of or relating to such an atom or group. [Latin substitu  ns, substituent-, present participle of substituere, to substitute; see substitute.] |
substituent [sʌbˈstɪtjʊənt]
n
(Chemistry) Chem an atom or group that replaces another atom or group in a molecule or can be regarded as replacing an atom in a parent compound
adj
substituted or substitutable
[from Latin substituere to substitute]
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