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inoculum

[ih-nok-yuh-luh m]
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noun, plural in·oc·u·la [ih-nok-yuh-luh] /ɪˈnɒk yə lə/.
  1. the substance used to make an inoculation.
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Origin of inoculum

1900–05; < New Latin, equivalent to inocul(āre) to inoculate + -um noun suffix
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for inocula

inoculum

inoculant

noun plural -la (-lə) or -lants
  1. med the substance used in giving an inoculation
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Word Origin

C20: New Latin; see inoculate
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
inocula in Medicine

inoculum

(ĭ-nŏk′yə-ləm)
n. pl. in•oc•u•lums
  1. The microorganisms or other material used in an inoculation.inoculant
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.