inoculum
Noun
Meaning
a substance (a virus or toxin or immune serum) that is introduced into the body to produce or increase immunity to a particular disease
Source: WordNetSynonyms
Hypernyms
Examples
If inoculum is not added, fermentation could take up to 7 days.
Virus or phage cultures require a two-stage inoculation: after the agar preparation, bacteria are grown in the dish to provide hosts for the viral inoculum.
When inoculum is added, fermentation can take approximately 20 hours to 3 days.
Tool released Fear Inoculum, its first new album in 13 years, in August, and is in the midst of an accompanying tour.