indicāˈtion noun

1. The act of indicating
2. A mark
3. A token
4. A reading on a gauge, dial, etc
5. Suggestion of treatment
6. A sign
7. A symptom

indicative /in-dikˈə-tiv/ adjective

1. Pointing out
2. Giving intimation
3. Applied to the mood of the verb that expresses fact (grammar)

1. The indicative mood
2. A verb in the indicative mood

indicˈatively adverb

inˈdicātor noun

1. Someone who or that which indicates
2. Something that provides an indication
3. A pointer
4. A device in a motor vehicle that activates a flashing light to show that the driver intends to move in a certain direction
5. A diagram showing names and directions of visible objects, as on a mountain top
6. A substance showing chemical condition by change of colour
7. A measuring contrivance with a pointer or the like
8. Any device for exhibiting condition for the time being
9. (with cap) a genus of birds, the honey guides

inˈdicatory (or /-dikˈ/) adjective

indicated horsepower noun

(of a reciprocating engine) the horsepower developed by the pressure-volume changes of the working agent within the cylinder, exceeding the useful or brake horsepower at the crankshaft by the power lost in friction and pumping

indicator diagram noun

A graphical representation of the pressure and volume changes undergone by a fluid in performing a work-cycle in the cylinder of an engine on compression, the area representing, to scale, the work done during the cycle

indicator species noun (biology)

A species whose presence or absence indicates particular conditions in a habitat