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8 Words That Are Older Than You Think

alexin

[uh-lek-sin] /əˈlɛk sɪn/
noun, Immunology
1.
complement (def 10).
Origin
1890-1895
1890-95; < Greek aléx(ein) to ward off + -in2
Related forms
alexinic
[al-ek-sin-ik] /ˌæl ɛkˈsɪn ɪk/ (Show IPA),
adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for alexinic

alexin

/əˈlɛksɪn/
noun
1.
(immunol) a former word for complement (sense 9)
Derived Forms
alexinic (ˌælɪkˈsɪnɪk) adjective
Word Origin
C19: from German, from Greek alexein to ward off
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
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