n :  any of numerous elasmobranch fishes (order Hypotremata) having the body flattened dorsoventrally, the eyes on the upper surface, and a much-reduced caudal region having typically a slender process often with venomous spines
, n 1  :  one of the lines of light that appear to radiate from a bright object  2  :  a beam of radiant energy (as light) of small cross section  3 a  :  a stream of material particles traveling in the same line (as in radioactive phenomena)  b  :  a single particle of such a stream rayed adj 
 
 
 
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