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Running down the "back" of the back is the spinal column, which has a smaller diameter than the vertebrae and which has a "Y" - shaped cross-section.

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Definitions (202)

Toggle American Heritage definitions American Heritage Dictionary (48)

  1. noun The posterior portion of the trunk of the human body between the neck and the pelvis; the dorsum.
  2. noun The analogous dorsal region in other animals.
  3. noun The backbone or spine.

Toggle Century definitions Century Dictionary (120)

Toggle GNU Webster definitions GNU Webster's 1913 (6)

Toggle WordNet definitions WordNet (28)

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This word has been looked up 169 times.

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Roget's II Roget's II: The New Thesaurus

Allen's Allen's Synonyms and Antonyms

Used in the same context Used in the Same Context

down ·  several ·  upper ·  narrow ·  third ·  rear ·  wooden

Used in the same contextWord Family

back:   backs ·  backing ·  backed
Roget's II: The New Thesaurus, Third Edition by the Editors of the American Heritage® Dictionary. Copyright © 2003, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Etymologies (7)

Toggle American Heritage etymologies American Heritage Dictionary (2)

  1. Middle English bak, from Old English bæc.
  2. Dutch bak, from French bac, from Old French, boat, from Vulgar Latin *baccus, vessel, probably of Celtic origin.

Toggle Century etymologies Century Dictionary (5)

  1. from Middle English bak, from Anglo-Saxon bæc = Old Saxon bak = OFries. bek = Middle Dutch bak (Dutch bak- in comp.) = Low German bak (also in comp., bak-, later G. back- in comp., also separately, back, forecastle) = Icelandic Swedish bak = Danish bag, back. Cf. Anglo-Saxon hrycg, back, English ridge.
  2. from back, n., and back, adv., the attributive use of the noun, as in backbone, mingling with that of the adverb, as in back yard, the yard which is back, back spring, a spring backward, etc. As with fore, hind, after, etc., there is no definite dividing line between the separate adjective use and the use in composition.
  3. By apheresis for aback, from Middle English abak, from Anglo-Saxon on bæc: see aback and back, n.
  4. In senses I., 1-8, from back, n.; in senses I., 9-11, and II., from back, adv.
  5. from Dutch bak, a bowl, tray, = Danish bakke, a tray, from French bac, a trough, basin, a brewer's or distiller's back, also a ferry-boat; cf. Breton bak, bag, a boat, Middle Latin bacus, baccus, a ferry-boat, bacca, a bowl (‘vas aquarium’); origin uncertain. Cf. basin, from the same source.
 

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/bæk/
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