cerumen

This term is the precise medical designation for earwax. It is used almost exclusively in clinical, anatomical, or pharmacological contexts. In everyday conversation, the colloquial term "earwax" is used; using "cerumen" in a casual setting would sound overly formal or clinical.

As a biological secretion, the word is treated as an uncountable mass noun. It describes the substance itself rather than individual units, meaning it does not have a standard plural form in medical literature.