Go to 'thermo-' entry Go to 'dino-' entry Go to 'chondro-' entry Go to 'aero-' entry Go to '-logy' entry Go to 'thaumato-' entry Go to 'nano-' entry Go to '-sophy' entry Go to 'bucco-' entry Go to '-ism' entry Go to '-lysis' entry Go to 'galacto-' entry Go to '-anthropy' entry Go to 'pneumo-' entry Go to '-ploitation' entry Go to '-lithic' entry Go to '-sepalous' entry Go to 'onco-' entry Go to '-parous' entry Go to 'dermato-' entry Go to 'multi-' entry Go to 'dodeca-' entry Go to '-zoon' entry Go to 'vermi-' entry Go to 'crystallo-' entry Go to 'biblio-' entry Go to 'eco-' entry Go to 'juxta-' entry Go to 'facio-' entry
Affixes: the building blocks of English
Affixes: the building blocks of English

sero-

Serum; a serous membrane.

[Latin serum, whey.]

Serum is the amber-coloured, protein-rich liquid which separates out when blood coagulates, for which the associated adjective is serous; serology is its scientific study or diagnostic examination. A seropositive individual has a positive result in a test of blood serum, say for the presence of a virus, while someone seronegative tests negative; seroconversion is the change from the latter state to the former. The seroprevalence of a pathogen is its level in a population, as measured in blood serum. Serotonin is a neurotransmitter present in blood platelets and serum.

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