plural of geographical indication

plural of therapeutic index

plural of Jaccard index

(communication, nautical) an emergency location radio beacon, used on ships

plural of emergency position indicating radio beacon

(chemistry) A substance that shows the acidity or alkalinity of a solution by its colour.

(aviation) An aircraft instrument that provides an indication of the vertical change in position.

(aviation) An instrument installed in an aircraft that indicates the rate at which the aircraft is gaining or losing altitude.

An aircraft instrument that shows both the aircraft's rate of turn about the vertical axis and also the amount of banking about the longitudinal axis.

(management) A financial or non-financial metric used to help an organization define and measure progress towards its goals.