substituent

plural substituents

1. chemistryAny atom, group, or radical substituted for another, or entering a molecule in place of some other part which is removed.

   Other highly effective heterocyclic substituents were pyrazinyl and quinoxalyl.

   1951, Apollonia Frances Olson, Helen G. Tibbitts, A Study of Head Nurse Activities in a General Hospital, 1950, page 163

   2 more examples

   From ethyleneoxides or ethyleneimines carrying an acyl substituent, with hydrazine and its derivatives (Ch. 3. XV).

   2009, Richard H. Wiley, Pyrazoles and Reduced and Condensed Pyrazoles, Volume 22, page 387

   In a recent paper on homopyrimidine decamers containing aeg-monomers and thymine monomers with a sulfomethyl substituent at the γ-position, similar triplexes has also been described [43 ].

   2015 October 16, “Polyanionic Carboxyethyl Peptide Nucleic Acids ( ce -PNAs): Synthesis and DNA Binding”, in PLOS ONE, →DOI

2. grammarPro-form.