augmentation

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augmentation

The difference at a particular time between the topocentric and geocentric semidiameter of a celestial body. See also diurnal libration.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

augmentation

[‚ȯg·mən′tā·shən]
(astronomy)
The apparent increase in the semidiameter of a celestial body, as observed from the earth, as the body's altitude (angular distance above the horizon) increases, due to the reduced distance from the observer; used principally in reference to the moon.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Position statement on percutaneous vertebral augmentation: A consensus statement developed by the American Society of Interventional and Therapeutic Neuroradiology, Society of Interventional Radiology, American Association of Neurological Surgeons/ Congress of Neurological Surgeons, and American Society of Spine Radiology.
The text is divided into sections on cervical and thoracolumbar surgeries and morbidities, and on miscellaneous disorders, such as percutaneous vertebral augmentation and post-traumatic deformity of the thoracolumbar spine.
Radiofrequency-targeted vertebral augmentation (RFTVA) is a novel percutaneous vertebral augmentation technique that was developed to address some of the limitations of BK while maintaining the benefit of vertebroplasty and BK.

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