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sigmate

[sig-mit, -meyt]
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adjective
  1. having the form of the Greek sigma or the letter S.
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Origin of sigmate

First recorded in 1885–90; sigm(a) + -ate1
Related formssig·ma·tion [sig-mey-shuh n] /sɪgˈmeɪ ʃən/, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for sigmate

sigmate

adjective
  1. shaped like the Greek letter sigma or the Roman S
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Derived Formssigmation (sɪɡˈmeɪʃən), noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012