Biomarker

Biomarker (science) can be an indicator of some biological state or condition, and those indicators can be measured.

Biomarker or biomarkers can be:
 Biomarker (aging), molecular indicator of biological age
 Biomarker (medicine), a measurable indicator of the state of a disease, or a measurable indicator of if a disease is prestent 
Biomarker (Alzheimer's), indicator of Alzheimer's disease
Biomarker (cancer), indicator of cancer
Tumor biomarker, a molecule secreted by a tumor
Biomarker (diabetes), indicator of diabetes mellitus
Imaging biomarker, an attribute in a medical image or scan indicative of a condition or disease
 Biomarker (toxicology), indicator of exposure to a chemical
 Biosignature, or biomarker, a fossil organic molecule that provides evidence of past or present life