biomarker
bi o mark er |ˈbīōˌmärkər ˈbaɪoʊmɑrkər | ▶noun a measurable substance in an organism whose presence is indicative of some phenomenon such as disease, infection, or environmental exposure: a biomarker that may predict aggressive disease recurrence in liver transplant recipients.
bio |mark ¦er |ˈbʌɪəʊmɑːkə (r )| ▶noun a naturally occurring molecule, gene, or characteristic by which a particular pathological or physiological process, disease, etc. can be identified.