English
serotype
From sero- + -type.
Formed from sero + type
Proto-Indo-European *(s)tewp- ‘to push’
Ancient Greek τύπτω ‘to strike’
Ancient Greek τύπος ‘mark’
Latin typus
Middle English type ‘symbol’
English type
Today it means
noun A group of microorganisms characterised by a specific set of antigens.
Language periods are conventional ranges, not dates for this word.
Etymograph / serotype