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| Locating objects by using sound and echoes |
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Definition
| Formed in imitation of natural sound |
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Definition
| Involuntary parrot like repititions |
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Definition
| Second epoch of Tertiary period |
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Definition
| A noninvasive technique that uses ultrasound to record the functioning of the heart |
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Definition
| related to the early stone age |
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Definition
| a very early and crude stone tool |
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| Genus of early man; dawn man |
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Definition
| The outer part of solid earth composed of rock |
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Definition
| The process or method of printing from a metal or stone surface |
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