serum is the dictionary form of sera Definition of serum
serum has definitions from the field of biology
1
[ noun ] (biology) watery fluid of the blood that resembles plasma but contains fibrinogen

Synonyms

blood_serum

2
[ noun ] (biology) colorless watery fluid of blood and lymph containing no cells and in which erythrocytes and leukocytes and platelets are suspended

Synonyms

plasma plasm

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