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Definition
| a means of locating an object using emitted sound and the reflection from it |
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| a noninvasive technique that uses ultrasound to record the functioning of the heart |
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Definition
| formed in the imitation of some natural sound |
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| involuntary parrot-like repitition of a word or phrase just spoken by another |
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Definition
| free from echoes and reverberations echoing |
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Definition
| the outer part of the solid earth composed of rock |
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Definition
| related to the early Stone Age |
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| a genus of early man comprising the only piltdown man; dawn man |
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| a very early and crude stone tool |
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Definition
| the process or method of printing from a metal or stone surface |
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Definition
| relating to the second epoch of the tertiary period |
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