osteoradionecrosis

os·te·o·ra·di·o·ne·cro·sis

[os-tee-oh-rey-dee-oh-nuh-kroh-sis, -ne-]
noun Pathology.
bone tissue death induced by radiation.

Origin:
osteo- + radio- + necrosis

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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American Heritage
Medical Dictionary

osteoradionecrosis os·te·o·ra·di·o·ne·cro·sis (ŏs'tē-ō-rā'dē-ō-nə-krō'sĭs, -ně-)
n.
Necrosis of bone caused by exposure to ionizing radiation.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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00:10
Osteoradionecrosis has a plethora of syllables.
So is pneumonoultramicroscopicsilicovolcanoconiosis. Does it mean:
an obscure term ostensibly referring to a lung disease caused by silica dust, sometimes cited as one of the longest words in the English language.
the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
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