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Related to shielding: Radiation shielding

shield

 [shēld]
1. any protecting structure.
2. in radiology, a protective device, often made of lead, through which particualr types of rays cannot pass; used to avoid the effects of ionizing radiation.

shield

(shēld),
A protecting screen; lead sheet for protecting the operator and patient from x-rays.
[A.S. scild]

shield

(shēld) any protecting structure.
Buller's shield  a watch glass fitted over the eye to guard it from infection.
nipple shield  a device to protect the nipple of a nursing woman.

shield

Etymology: AS, scild
a toxic neurological condition that results from eating clams, oysters, or mussels that have ingested the toxin-producing protozoa commonly called the red tide. The characteristic symptoms appear within a few minutes and include nausea, light-headedness, vomiting, and tingling or numbness around the mouth, followed by paralysis of the extremities and, possibly, respiratory paralysis. Saxitoxin, the causative agent, is not destroyed by cooking. However, the severity of the illness is diminished if the water used in cooking is not consumed. See also Gonyaulax catenella, venerupin poisoning.

shield

Etymology: AS, scild
a material for preventing or reducing the passage of charged particles or radiation. A shield may be designated by the radiation it is intended to absorb, such as a gamma ray shield, or by to the kind of protection it is intended to give, such as a background, biologic, or thermal shield. Lucite and aluminum can be used for beta-radiation shields, but lead is required for gamma ray shields.

shield

Infectious control A protective device that covers the face, which has a plasticine barrier through which the user sees. See Personal protection garment Medtalk That which protects, a protective barrier. See Dalkon shield, Human shield.

shield

(shēld)
A protecting screen; lead sheet for protecting the operator and patient from x-rays.

shield

(shēld)
A lead sheet to protect operator and patient from x-rays.
References in periodicals archive ?
Measurements were done overnight or on week-ends with the thermal stabilization turned on to avoid "thermo-currents" in the shielding.
permanent demagnetization with an ac current of at least 1 A, applied to the two outer shielding layers.
Sentivist's Dynamic Shielding Architecture automatically recognizes attack threat points and dynamically protects those threat points against the inevitable attack.
Uniquely combining its hybrid detection engine and Dynamic Shielding Architecture, NFR Security delivers highly accurate protection through inline prevention and automation against real time threats.
With the launch of our new Dynamic Shielding Architecture, NFR is providing our customers with an adaptive, low touch system that can automatically protect against a wide range of network threats," said Andre Yee, president and CEO of NFR Security, Inc.
NFR Security's Sentivist Dynamic Shielding Architecture will be available to customers worldwide during Q3 2005.
Headquartered in Palatine, BMI electronic components are custom designed to ensure EMI shielding, gounding and electrical continuity.