| Ridell operation |
obliteration of the frontal sinus by removal of the anterior wall and floor and sometimes posterior walls of the sinus; for treatment of malignant tumors.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| ridge |
A ridge is a geological feature that features a continuous elevational crest for some distance. Ridges are usually termed hills or mountains as well, depending on size. There are several main types of ridges: *Dendritic ridge: In a typical plateau terrain, the stream drainage valleys will leave intervening ridges. These are by far the most common ridges. ...
출처: en.wikipedia.org/wiki/Ridge
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| ridge |
A narrow roughened elevation on a bone's surface.
출처: www.modernhumanorigins.com/r.html
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| ridge |
an elongated area of relatively high pressure extending from the centre of a high-pressure region; the opposite of a trough.
출처: members.tripod.com/~MitchellBrown/almanac/weather_...
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| ridge |
Sharp-edged elevation of shell surface occurring as a single line.
출처: www.fish.washington.edu/naturemapping/mollusks/glo...
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