sheath

n., pl., sheaths (shēTHz, shēths).

1. 1. A case for a blade, as of a sword.
   2. Any of various similar coverings.
2. Biology. 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.
3. A close-fitting dress.
4. A condom.

tr.v., sheathed, sheath·ing, sheaths (shēTHz, shēths).
To encase or cover with or as if with a sheath; sheathe.

[Middle English schethe, from Old English scēath.]

noun

A thin outer covering of an object: lamina, membrane, sheathing, skin. See surface/depth.

In reinforced concrete, an enclosure which encases posttensioned tendons to prevent their being bonded during the placement of concrete.

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Layer of connective tissue surrounding structures such as blood vessels, muscles, nerves, and tendons.

1. a tubular case or envelope.
2. vernacular for prepuce.

• adrenal pericapsular s. — contains a plexus of large nerve trunks with numerous ganglion cells.
• arachnoid s. — the delicate membrane between the pial sheath and the dural sheath of the optic nerve.
• carotid s. — a portion of the cervical fascia enclosing the carotid artery, internal jugular vein, and vagus or vagosympathetic nerve.
• carpal tendon s's — sheaths to the tendons of the muscles which course over the carpus.
• crural s. — femoral sheath.
• dural s. — the external investment of the optic nerve.
• femoral s. — the fascial sheath of the femoral vessels.
• Henle's s. — the endoneurium, especially the delicate continuation around the terminal branches of nerve fibers.
• lamellar s. — the perineurium.
• medullary s., myelin s. — the sheath surrounding the axon of myelinated nerve cells, consisting of concentric layers of myelin formed in the peripheral nervous system by the plasma membrane of Schwann cells, and in the central nervous system by the plasma membrane of oligodendrocytes. It is interrupted at intervals along the length of the axon by gaps known as nodes of Ranvier. Myelin is an electrical insulator that serves to speed the conduction of nerve impulses.
• pial s. — the innermost of the three sheaths of the optic nerve.
• root s. — the epidermal layer of a hair follicle.
• s. of Schwann — neurilemma.
• synovial s. — a synovial membrane sleeve through which a tendon moves; found commonly where a tendon passes over a joint.

Any tubular or sheathing organ, often leaflike or membranous, that surrounds the base of a stalk or helps to form one. Sheaths are common in the grasses and palms but infrequent among dicots.

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Common misspelling(s) of sheath

• sheat

Dansk (Danish)
n. - skede, kondom
v. tr. - stikke i skeden, omslutte, beklæde

Nederlands (Dutch)
schede

Français (French)
n. - préservatif, (Bot) gaine, fourreau, gaine (d'un couteau)
v. tr. - rengainer, rentrer (les griffes), replier (les ailes), gainer (un câble)

Deutsch (German)
n. - Scheide, Mantel
v. - in die Scheide stecken, umhüllen

Ελληνική (Greek)
n. - θήκη, θηκάρι, περίβλημα, εφαρμοστό (γυναικείο) φόρεμα, προφυλακτικό
v. - βάζω σε θήκη ή θηκάρι (κν. θηκαρώνω)

Italiano (Italian)
guaina

Português (Portuguese)
n. - bainha (f), forro de espada (m), estojo (m)
v. - embainhar

Русский (Russian)
ножны, футляр, облегающее неотрезное платье, влагалище, защитная насыпь из камней, чехол, кожух, оболочка, презерватив

Español (Spanish)
n. - vaina, funda, preservativo
v. tr. - envainar, hundir, clavar, poner funda o cubierta, cubrir, forrar

Svenska (Swedish)
n. - fodral, slida, balja, kondom, fodralklänning
v. - lägga i fodral, sticka i slidan, beklä, överdra

中文（简体）(Chinese (Simplified))
鞘, 外壳, 护套, 把...插入鞘, 包, 覆盖, 把...刺入皮肉

中文（繁體）(Chinese (Traditional))
n. - 鞘, 外殼, 護套
v. tr. - 把...插入鞘, 包, 覆蓋, 把...刺入皮肉

한국어 (Korean)
n. - 칼집, 엽초, 콘돔
v. tr. - 칼집에 넣다, 덮다, 씌우다

日本語 (Japanese)
n. - 鞘, さや状のもの, 覆い, 葉鞘, 翅鞘, コンドーム

العربيه (Arabic)
‏(الاسم) ثوب نسوي ضيق, غمد, قراب (فعل) يغمد‏

עברית (Hebrew)
n. - ‮נדן, נרתיק, בגד צמוד, כובעון‬
v. tr. - ‮שם בנדן‬

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sheath	Misses Petite Sheath Dress
Sheath Dress	Sheath Floral Dress