mottle

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mottle

[′mäd·əl]
(medicine)
An effect that occurs during radiological imaging when the dose of radiation is reduced to a level where quantum effects can be observed.

mottle

1. The pattern or arrangement of spots and cloudings forming a mottled surface, esp. in marble, or in wood veneer as a result of unusual variation in fiber growth or fiber arrangement. Also see fiddleback, quilted figure, blister figure. 2.See mottling.
References in periodicals archive ?
3a): grey and light brown with red mottles on the crest and upper slope; white at the slightly waning midslope; grey and light brown with red mottles again under the rest of the midslope and under the lower-slope; and brown on the flat.
The transformation sequence of the mottles in the plinthite, as soil formation progresses downward in the profile, appears to be red (2.
The traditional approach describes variation of soil morphological features in soil horizons, such as A-horizon thickness and depth to mottles in B-horizons.
the proportion of the ped interior that the mottles covered, each type or colour of mottle separately.