Which prefix means 'Lump, clot'?

Which prefix means 'Lump, clot'?

• A. Mal-
• B. Glom-
• C. Vestibule-
• D. Thromb-

Answer: (D)

Thromb- is the combining form that signals a clot. It comes from a Greek root for clotting and shows up in terms like thrombosis (the process of clot formation) and thrombus (the clot itself). That makes it the right fit when the focus is on a clot within the blood vessels or the blood-clot concept. The other options don’t refer to a clot: mal- means bad or abnormal, glom- refers to a rounded lump or ball (as in glomerulus), and vestibule- means an entrance or doorway. So thromb- is the direct way to express the idea of a blood clot.

Thromb- is the combining form that signals a clot. It comes from a Greek root for clotting and shows up in terms like thrombosis (the process of clot formation) and thrombus (the clot itself). That makes it the right fit when the focus is on a clot within the blood vessels or the blood-clot concept. The other options don’t refer to a clot: mal- means bad or abnormal, glom- refers to a rounded lump or ball (as in glomerulus), and vestibule- means an entrance or doorway. So thromb- is the direct way to express the idea of a blood clot.