(medicine, anthropology) A measure of the elongation or flatness of a head or skull: the maximum breadth of the skull divided by its maximum length, multiplied by 100.

(transitive) To index under a secondary heading or keyword, so that an item may be looked up or located in an alternative way.

(finance) A mutual fund that closely resembles an index fund, while charging higher fees for active management.

A series of alphabetically marked or otherwise labelled semicircular cut-outs in the fore edge of a large reference book, encyclopaedia, Bible, etc., that allows quick access to various parts of the text.

(audiology) a tool used to predict the amount of speech that is audible to a patient with a specific hearing loss

plural of index term

plural of index rerum

(economics) A statistical estimate of the level of prices of goods and services bought for consumption purposes by households.

A statistical measure of the weight of a person scaled according to height, used to estimate if a person is underweight or overweight. BMI units are defined as kg/m² ≈ 703*lb/in².

A measure that is calculated as a weighted average of the prices of a defined range of stocks