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inoculum Line breaks: in|ocu|lum
Pronunciation: /ɪˈnɒkjʊləm/

Definition of inoculum in English:

noun (plural inocula /ɪˈnɒkjʊlə/)

A substance used for inoculation.
Example sentences
  • The inoculum used for medical device applications is typically Bacillus spores.
  • The inoculum was injected slowly into the bladder to avoid leakage and the catheter was withdrawn carefully.
  • About 20 percent of cases of this disorder occur in otherwise healthy persons who have received a heavy inoculum.


Early 20th century: modern Latin, from Latin inoculare (see inoculate), on the pattern of the pair coagulate, coagulum.

Definition of inoculum in:
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