verb (used with object), amputated, amputating.
to cut off (all or part of a limb or digit of the body), as by surgery.
to prune, lop off, or remove: Because of space limitations the editor amputated the last two paragraphs of the news report.
Obsolete. to prune, as branches of trees.

1630–40; < Latin amputātus pruned, trimmed (past participle of amputāre), equivalent to am(bi) around (cf. ambi-) + put- trim + -ātus -ate1

amputation, noun
amputative, adjective
amputator, noun
nonamputation, noun
postamputation, adjective
self-amputation, noun
unamputated, adjective
unamputative, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
amputate (ˈæmpjʊˌteɪt)
surgery to remove (all or part of a limb, esp an arm or leg)
[C17: from Latin amputāre, from am- around + putāre to trim, prune]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1610s, "a cutting off of tree branches, a pruning," also "operation of cutting off a limb, etc., of a body," from L. amputationem (nom. amputatio), noun of action from amputatus, pp. of amputare "to cut off, to prune," from am(bi)- "about" + putare "to prune, trim" (see pave).

1630s, from L. amputatus, pp. of amputare "to cut off, to prune" (see amputation).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

amputate am·pu·tate (ām'pyu-tāt')
v. am·pu·tat·ed, am·pu·tat·ing, am·pu·tates
To cut off a part of the body, especially by surgery.

amputation am·pu·ta·tion (ām'pyu-tā'shən)

  1. Surgical removal of all or part of a limb, an organ, or projecting part or process of the body.

  2. Traumatic or spontaneous loss of a limb, organ, or part.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
From childhood he was afflicted with a tuberculous disease which finally
  necessitated the amputation of a foot.
They would do what they could to stop bleeding, if they had to do an
  amputation, they did an amputation.
Diabetic foot disease, caused by changes in blood vessels and nerves, often
  leads to ulceration and eventual amputation.
In fact, diabetes is the leading cause of non-traumatic lower-limb amputation.
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