IPA: /sɪˈrɒlədʒɪst/
KK: /sɪˈrɑlədʒɪst/
A medical scientist who studies blood serum and its components, especially to diagnose diseases.
The serologist tested the blood samples for various infections.
Serologist → It is formed from "sero-" (from Latin "serum", meaning serum or the clear fluid part of blood) and "-logist" (from Greek "logistēs", meaning one who studies or specializes in). A serologist is someone who specializes in the study of serum, particularly in relation to blood and its components.
Think of 'serum' as the clear fluid part of blood, and remember that a 'serologist' is someone who studies this fluid.