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sheath

[sheeth] /ʃiθ/
noun, plural sheaths
[sheeth z] /ʃiðz/ (Show IPA)
1.
a case or covering for the blade of a sword, dagger, or the like.
2.
any similar close-fitting covering or case.
3.
a condom.
4.
Biology. a closely enveloping part or structure, as in an animal or plant.
5.
Botany. the leaf base when it forms a vertical coating surrounding the stem.
6.
a close-fitting dress, skirt, or coat, especially an unbelted dress with a straight drape.
7.
Electricity. the metal covering of a cable.
8.
Electronics.
  1. the metal wall of a wave guide.
  2. a space charge formed by ions near an electrode in a tube containing low-pressure gas.
  3. the region of a space charge in a cathode-ray tube.
verb (used with object)
9.
to sheathe.
Origin
950
before 950; Middle English s(c)heth(e), Old English scēath; cognate with German Scheide; see shed2
Related forms
sheathless, adjective
sheathlike, sheathy, adjective
Can be confused
sheath, sheathe.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for sheathlike

sheath

/ʃiːθ/
noun (pl) sheaths (ʃiːðz)
1.
a case or covering for the blade of a knife, sword, etc
2.
any similar close-fitting case
3.
(biology) an enclosing or protective structure, such as a leaf base encasing the stem of a plant
4.
the protective covering on an electric cable
5.
a figure-hugging dress with a narrow tapering skirt
6.
another name for condom
verb
7.
(transitive) another word for sheathe
Word Origin
Old English scēath; related to Old Norse skeithir, Old High German sceida a dividing; compare Old English scādan to divide
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for sheathlike

sheath

n.

Old English sceað, scæð, from Proto-Germanic *skaithiz (cf. Old Saxon scethia, Old Norse skeiðir (plural), Old Frisian skethe, Middle Dutch schede, Dutch schede, Old High German skaida, German scheide "a sheath, scabbard"), according to OED, possibly from root *skei- "divide, split" (see shed (v.)) on notion of a split stick with the sword blade inserted. Meaning "condom" is recorded from 1861; sense of "close-fitting dress or skirt" is attested from 1904.

Online Etymology Dictionary, © 2010 Douglas Harper
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sheathlike in Medicine

sheath (shēth)
n. pl. sheaths (shēðz, shēths)
An enveloping tubular structure, such as the tissue that encloses a muscle or nerve fiber.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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sheathlike in Science
sheath
  (shēth)   
An enveloping tubular structure, such as the base of a grass leaf that surrounds the stem or the tissue that encloses a muscle or nerve fiber.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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