shield (shēld) any protecting structure.
shield
shield [shēld]
shield
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 (sh ld)n. A protective device or structure, such as a lead sheet to protect an individual from x-rays. |
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 [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
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.
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