Webster's English Dictionary

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rubus

ru.bus \'ru:-b*s\ n or rubus [NL, genus name, fr. L, blackberry] pl  : a 
   plant (as a blackberry or raspberry) of a genus (Rubus) of the r ose family 
   having 3- to 7-foliolate or simple lobed leaves, white or pink flowers, and 
   a mass of carpels ripening into an aggregate fruit composed of many 
   drupelets