shield


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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 ?
Make sure the square protrusion on the bottom of the lever seats snugly into the groove of the pintle adapter of the weapon shield.
A 3-dimensional external stabilization system in Helmholtz-like configuration was built and tested in conjunction with a 4-layer permalloy shield and the pickup sensor outside the shield.
The Solid Side Shields protect the eyes of personnel who wear eyeglasses.
The Dalkon Shield was sold in the United States from January 1971 to June 1974, when the manufacturer, pressed by a worried Food and Drug Administration (FDA), ended domestic sales (but continued foreign sales until at least April 1975).
RFMD's self shielding technology is designed to eliminate the need for custom external shields by integrating RF shielding into the RFIC or module.
The shield kit comes with NSN 2510-01-498-4996 and contains the shield, brackets, adapters, hardware, and installation instructions.
The new company, which will emphasize innovative managed care products and customer service, begins with a foundation of two million subscribers of Pennsylvania Blue Shield, one of the nation's largest dental care insurers.
The executives responsible for the recent corporate catastrophes popularly known as Agent Orange, asbestos, and the Dalkon Shield are not in jail and will not go to jail.
The bad news is that there aren't many weapon shield kits available.
Anti-fraud specialists representing Pennsylvania's Blue Cross and Blue Shield Plans announced record recoveries involving fraud and denied payments among health care providers in the state.
Partners include Blue Cross and Blue Shield of Illinois, Blue Cross and Blue Shield of Texas, Health Net of Arizona, and UnitedHealth Group.
To use the service, Blue Cross and Blue Shield subscribers who visit a doctor or hospital participating in Quattro will simply identify themselves as Quattro participants under their employer's health plan.