silhouette

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silhouette

outline of a figure. The sharpness of the silhouette is a function of the shape, size and density of the object. This is most marked in radiography.

basketball-shaped silhouette
the enlarged cardiac outline seen in the dorsal-ventral view of the thorax in a dog with chronic pericardial effusion.
silhouette sign
produced when two fluid densities are contiguous and the individual outline of each is lost. Commonly used in the evaluation of chest problems.
References in periodicals archive ?
He reported that although silhouetted disks are apparent around only 10 percent of low-mass stars in the Orion star-forming cluster, an additional 30 percent of the stars lie near ionized knots of gas (SN: 6/18/94, p.
Subtle variations in tone create a delicate sfumato around the silhouetted objects, suggesting that they exist not just on the flattened surface of the paper but in a foglike atmosphere.