3. A formula expressing the relationship of one value, property, form, or ratio to another. See Ankle-brachial index, Atherogenic index,
Barthel index, Bessman index, Biotechnology index, Bispectral index,
Body mass index,
Cardiac index, Case-mix index, Cephalic index, Clamp-derived insulin-sensitivity index, DNA index,
Duke Activity Status index, England index, Family suffering index,
Foam stability index,
Free thyroxine index, Framingham Physical Activity index,
Geographic practice cost index,
Glycemic index, Greenhouse index,
Heat index, Hemacytology index, Hemogram index, Hepatic iron index, HERP index, Hollingshead index, Icterus index, IgG index, IgM index,
International sensitivity index, Insulin sensitivity index, Krimsky index, Labeling index,
Lesquesne index, Life Events index, Locomotion index, Maturation index, Medicare Economic index, Mentzler index, Merck index,
Misery index,
Mitotic activity index,
Mother index,
National Death index, Nuclear contour index, Obstructive apnea-hypopnea index, Organism-specific antibody index,
Pearl index, Phagocytic index, Pollution Standards index, Poverty index,
Prognostic nutritional index, Proliferation index, Singh index, Psoriasis Area and Severity index, Quetelet index,
Rate-adjusted mortality index, Shine & Lal index, Side Effects & Symptoms Distress index, Sleep Impairment index, Splenic index, Standard deviation index,
Stress index,
Therapeutic index, Thymidine labeling index,
Transitional-dyspnea index, Uncitedness index, UV index.