plural of attitude indicator

plural of bite indicator

plural of chemical indicator

plural of dial indicator

plural of global indicator

(rail transport) A panel attached to a colour light signal situated just before a junction, which when lit up indicates that a diverging route has been set for the next train.

plural of route indicator

plural of direction indicator

(automotive) A turn signal or indicator. / (aviation) An instrument that shows both the current heading and the desired heading needed to follow a predetermined course.

(Internet) A symbol conveying the tone or context of a message.