| NOUN | substance | contrast material, contrast medium | a substance that is opaque to x-rays |
|---|
| Meaning | A substance that is opaque to x-rays; when administered it allows a radiologist to examine the organ or tissue it fills. | |
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| Synonym | contrast medium | |
| Broader | medium | (biology) a substance in which specimens are preserved or displayed |
| Spanish | material de contraste, medio de contraste | |
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