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[ek-oh-loh-key-shuh n] /ˌɛk oʊ loʊˈkeɪ ʃən/

the general method of locating objects by determining the time for an to return and the direction from which it returns, as by radar or sonar.
Zoology. the sonarlike system used by dolphins, bats, and other animals to detect and locate objects by emitting usually high-pitched sounds that reflect off the object and return to the animal’s ears or other sensory receptors.
determination of the position of an object by measuring the time taken for an echo to return from it and its direction

1944, from echo (n.) + location.
Sonar, especially of animals, such as bats and toothed whales. See more at sonar.


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  • Echolalia

    [ek-oh-ley-lee-uh] /ˌɛk oʊˈleɪ li ə/ noun 1. Psychiatry. the uncontrollable and immediate repetition of words spoken by another person. 2. the imitation by a baby of the vocal sounds produced by others, occurring as a natural phase of childhood development. /ˌɛkəʊˈleɪlɪə/ noun 1. (psychiatry) the tendency to repeat mechanically words just spoken by another person: […]

  • Echoism

    [ek-oh-iz-uh m] /ˈɛk oʊˌɪz əm/ noun 1. . /ˈɛkəʊˌɪzəm/ noun 1. onomatopoeia as a source of word formation 2. phonetic assimilation of one vowel to the vowel in the preceding syllable

  • Echoic memory

    noun 1. (psychol) the ability to recapture the exact impression of a sound shortly after the sound has finished Compare iconic memory

  • Ecosphere

    [ek-oh-sfeer, ee-koh-] /ˈɛk oʊˌsfɪər, ˈi koʊ-/ noun 1. Also called physiological atmosphere. the part of the atmosphere in which it is possible to breathe normally without aid: the portion of the troposphere from sea level to an altitude of about 13,000 feet (4000 meters). 2. Ecology. the planetary ecosystem, including all the earth’s living organisms […]

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