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“rarefaction”
rarefaction
1. A decrease in density.
2. In acoustics, an area of expansion in a sound wave, the portion of a three0dimensional sound wave in which the medium compression that is due to acoustic energy is minimal and which, if measured as a standing waving of pressure versus time, would be a point at which the signal amplitude is minimum.
3. The process of decreasing in density and weight, as of air.
2. In acoustics, an area of expansion in a sound wave, the portion of a three0dimensional sound wave in which the medium compression that is due to acoustic energy is minimal and which, if measured as a standing waving of pressure versus time, would be a point at which the signal amplitude is minimum.
3. The process of decreasing in density and weight, as of air.
The farther from the surface of the earth, the less dense the atmosphere becomes.
This entry is located in the following units:
fac-, facil-, fact-, feas-, -feat, -fect, -feit, -facient, -faction, -fic-, -fy, -ficate, -fication
(page 30)
rar-, rare- +
(page 1)
Word Entries containing the term:
“rarefaction”
bone rarefaction
A decrease in density of part of a bone; especially, when this causes increased radiolucence (almost entirely invisible in x-ray photographs and under fluoroscopy).
This entry is located in the following unit:
rar-, rare- +
(page 1)
rarefaction of bone
The process by which bone becomes more porous because of absorption of mineral substances.
This may be caused by a disturbed calcium-phosphorus metabolism possibly resulting from excess parathyroid hormone.
This entry is located in the following unit:
rar-, rare- +
(page 1)