Definition of sero- in English:

sero-

Syllabification: sero-

combining form

1Relating to serum: serotype
1.1Involving a serous membrane: serositis

Origin

representing serum.

Definition of sero- in:

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Word of the day anomalous
Pronunciation: əˈnɒm(ə)ləs
adjective
deviating from what is standard, normal, or expected