noun, plural sequestra [si-kwes-truh] . Pathology.
a fragment of bone that has become necrotic as a result of disease or injury and has separated from the normal bone structure.

1825–35; < Neo-Latin; Medieval Latin: sequestrated property, derivative of Latin sequester; see sequester

sequestral, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
sequestrum (sɪˈkwɛstrəm)
n , pl -tra
pathol See sequester a detached piece of necrotic bone that often migrates to a wound, abscess, etc
[C19: from New Latin, from Latin: something deposited;]

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American Heritage
Medical Dictionary

sequestrum se·ques·trum (sĭ-kwěs'trəm)
n. pl. se·ques·tra (-trə)
A fragment of dead tissue, usually bone, that has separated from healthy tissue as a result of injury or disease.

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