Definition of sero- in English:

sero-

Pronunciation: /ˈsɪərəʊ/

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 guzzle
Pronunciation: ˈgʌz(ə)l
verb
eat or drink (something) greedily