abbr 1  sacral - used esp. with a number from 1 to 5 to indicate a vertebra or segment of the spinal cord in the sacral region <the relative length of cord segments S1 to S5>   2  signa - used to introduce the signature in writing a prescription  3  smooth - used of bacterial colonies  4  subject  5  svedberg
symbol sulfur .
 
 
 
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