the branch of medicine concerned with the study of blood, blood-forming organs, and blood diseases.

रक्त विज्ञान

English Usage: The doctor specialized in haematology and treated various blood disorders.

Hindi Usage: डॉक्टर रक्त विज्ञान में विशेषज्ञ थे और विभिन्न रक्त विकारों का उपचार करते थे।

relating to or based on comparison; used to describe how things are similar or different.