sheath

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sheath

1. Biology an enclosing or protective structure, such as a leaf base encasing the stem of a plant
2. the protective covering on an electric cable

sheath

[shēth]
(electricity)
A protective outside covering on a cable.
(electronics)
A space charge formed by ions near an electrode in a gas tube.
(electromagnetism)
The metal wall of a waveguide.
(science and technology)
A protective case or cover.

sheath

In reinforced concrete, an enclosure which encases posttensioned tendons to prevent their being bonded during the placement of concrete.
References in periodicals archive ?
Comparison of a Sheathless Trans-radial Access With Looping Technique and Transbrachial Access for Carotid Artery Stenting.
Furthermore, the use of a sheathless balloon inserted through the saphenous vein graft makes balloon removal easy and safe at the bedside under local anesthesia.
Since the MEGA has no step down between the catheter shaft and the balloon material, it may be inserted sheathless or through an 8 Fr.