(aviation) A two-letter indicator used in fare construction to indicate the basic routing that the fare applies to.

(chemistry) A substance that exists in an oxidized and reduced forms, these forms having different colours, changing colour at a specific redox potential

A function which is equal to 1 for all points in its domain which belong to a given set, and is equal to 0 for all points in the domain which do not belong to that given set.

plural of indicator variable

(statistics) A binary variable whose value of 0 or 1 indicates which category an individual falls into.

plural of indicator diagram

(dated) pressure volume diagram

plural of indicator function

plural of airspeed indicator

plural of redox indicator