indicator

From Late Latin indicātor (“one who points out”), from Latin indicō (“point out”); see indicate.

• (UK) IPA^(key): /ˈɪn.dɪ.ˌkeɪ.tə(ɹ)/

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indicator (plural indicators)

1. A pointer or index that indicates something.
   • 2012, Andrew Martin, Underground Overground: A passenger's history of the Tube, Profile Books, →ISBN, page 79:

     These old indicators [at Earl's Court station] show the destination of the next train by the appearance of an illuminated arrow next to the station name. The arrow may indicate that a train is going to Wimbledon, but it gives no clue as to when. Now, however, the indicators are supplemented by dot matrix panels that not only say where but also when. Why aren't the old ones removed? Because they, like the whole station, are Grade II listed.

2. A meter or gauge.
3. The needle or dial on such a meter.
4. (chemistry) Any of many substances, such as litmus, used to indicate the concentration of a substance, or the degree of a reaction.
5. (ecology) A plant or animal whose presence is indicative of some specific environment.
6. (economics) A measure, such as unemployment rate, which can be used to predict economic trends.
7. (UK, Australia, New Zealand, Ireland, South Africa, automotive) A turn signal; each of the flashing lights on each side of a vehicle which indicate a turn is being made to left or right, or a lane change etc.

   Synonyms: (informal) blinker, directional, directional signal, direction indicator, trafficator, turn indicator, (chiefly US) turn signal

8. A bird, the honeyguide.

• “indicator”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.
• “indicator”, in The Century Dictionary […], New York, N.Y.: The Century Co., 1911, →OCLC.

• anidrotic, cardiotin

From indicō (“point out, indicate, show”) +‎ -tor, from in (“in, at, on; into”) + dicō (“indicate; dedicate; set apart”).

• (Classical) IPA^(key): /in.diˈkaː.tor/, [ɪn̪d̪ɪˈkäːt̪ɔr]
• (modern Italianate Ecclesiastical) IPA^(key): /in.diˈka.tor/, [in̪d̪iˈkäːt̪or]

indicātor m (genitive indicātōris); third declension

1. (Late Latin) Someone who points out.

Third-declension noun.

indicātor

1. second/third-person singular future passive imperative of indicō

• “indicator”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• indicator in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• indicator in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.

Borrowed from French indicateur. Equivalent to indica +‎ -tor.

indicator n (plural indicatori)

1. indicator

• IPA^(key): /indikaˈtoɾ/ [ĩn̪.d̪i.kaˈt̪oɾ]
• Rhymes: -oɾ
• Syllabification: in‧di‧ca‧tor

indicator m (plural indicatores)

1. honeyguide