| background retinopathy |
(REH-tih-NOP-uh-thee) a type of damage to the retina of the eye marked by bleeding, fluid accumulation and abnormal dilation of the blood vessels. Background retinopathy is an early stage of diabetic retinopathy. Also called simple or nonproliferative (non-pro-LIF-er-uh-tiv) retinopathy.
출처: www.diabetes.org/diabetesdictionary.jsp
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| background radiation |
Radiation present in the environment as a result of naturally occurring radioactive materials, cosmic radiation, or human-made radiation sources, including fallout.
출처: www.stoller-eser.com/Annuals/2003/AppendixE.htm
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| background radiation |
Background radiation is the microwaves permeating the universe that are probably the remnants of the Big Bang. This background radiation accounts for a temperature of 2.7 K in space. BAILY'S BEADS Baily's beads (often spelled Bailey's beads) are bead-like bursts of light that appear about 15 seconds before and after totality during a solar eclipse. Baily's beads are caused by light shining through valleys on the edge of the moon. ...
출처: www.allaboutspace.com/subjects/astronomy/glossary/...
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| background radiation |
The natural radioactivity in the environment. Natural radiation consists of cosmic rays, filtered through the atmosphere from outer space, and radiation from the naturally radioactive elements in the earth (primarily uranium, thorium, radium and potassium). Also known as natural radiation.
출처: www.lrb.usace.army.mil/fusrap/glossary-ab.htm
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| background radiation |
The radiation in man's natural environment, including cosmic rays and radiation from the naturally radioactive elements, both outside and inside the bodies of humans and animals. It is also called natural radiation. Man-made sources of radioactivity contribute to total background radiation levels.
출처: www.orau.gov/reacts/definitions.htm
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