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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 ?
Shields, who carried Hart High to a Southern Section Div.
DeRoyal Face Masks With Splash Shields incorporate the standard pleated surgical facemasks with an extension of UltraClear antifog splash shields to provide lightweight, economical protection.
I devilishly enjoy playing this character," says De Shields with a glint in his eye, "because in the history of the black man in America, we've either been superhuman or subhuman, and all through this spectrum we've always had this incredible sexual prowess.
Consider the dreadful catastrophes caused by only two products: the Dalkon Shield, the defective intrauterine contraceptive device (IUD), and asbestos, the deadly material.
But that only made it harder for Shields to swallow later.
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.
Determina's Shields are also based on the vulnerability itself, and not on any specific attack vector.
Nevertheless, it showed the kind of arm Shields has, and how valuable he would become to the Angels' bullpen.
But Enure shields users from the complexities behind the scenes of home networking -- even if a user messes up the settings themselves -- so users never have to worry again about any complexity of home networking.
Shields had a solid 13-start audition last summer, but he's resigned to being a reliever, likely for life.
Shields Health Care Group produces over 140,000 reports a year, which drove the organization several years ago to adopt speech recognition technology to maximize efficiency; PowerScribe is now replacing Agfa's TalkStation.
So, after Shields was drilled for four home runs and seven runs in the Oakland Athletics' 14-4 victory Thursday, he could see the writing on the wall.