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ray
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   Also found in: Dictionary/thesaurus, Medical, Encyclopedia, Wikipedia 0.02 sec.

ray

Any of several orders (especially Ragiformes) of cartilaginous fishes with a flattened body, winglike pectoral fins, and a whiplike tail.

Species include the stingray, for example the Southern stingray Dasyatis americana, which has a serrated, poisonous spine on the tail, and the torpedo fish.

Ray

The supertonic note, pronounced ‘Ray’ and represented by the symbol r, in any key in tonic sol-fa notation, the system of musical notation without staves and notes and based on the old syllabic system of Do (Ut), Re, Mi, and so on.



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? Mentioned in ? References in periodicals archive
 
Immediately after the procedure, researchers randomly assigned patients to receive one of four different doses of radioactive yttrium-90 -- which emits beta rays -- within their arteries.
The peptide is designed to adhere to somatostatin receptors that are overexpressed by several types of cancer, while the Re-188 isotope "warhead" emits a beta ray that destroys tumor cells.
The ocean contains a certain amount of radioactive potassium, which emits beta rays that produce Cherenkov light of their own.
 
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