Anything that does not allow the penetration of X-rays.

Having a high radiodensity.

Effective in blocking x-rays. Breast tissue in younger women is usually more "radiopaque" than the fattier tissue in older women. Some contrast agents used in various x-ray procedures are also radiopaque. Also called radiodense.

not transparent to X-rays or other forms of radiation; "barium sulfate is radiopaque"

Easy to see on a x-ray.

Not allowing the passage of X-rays, gamma rays, or other forms of radiant energy.

not permitting the passage of x-rays, therefore visible on an x-ray image.

impenetrable to X-rays; appear as a light area on a radiograph

A light area on an x-ray

The white or clear appearance in a radiograph that results from the inability of radiant energy to pass through a structure. The more dense the structure (i.e., amalgam restorations), the whiter it appears in the radiograph.

Anything that does not let X-rays or other types of radiation penetrate. Radiopaque objects block radiation. They are opaque to radiation. See the entire definition of Radiopaque

Blocking the passage of X-rays and other forms of electromagnetic radiation.

something that is visible on plain x-rays, such as calcium stones

Opaque to x-ray radiation and thus visible on x-ray film.

an object/item/mass that appears on a radiograph that does not allow the x-ray to pass through it when in normal circumstances it would, (eg. a bone that looks more dense than the bones around it)