Rosaceous \Ro*sa"ceous\, a. [L. rosaceus, fr. rosa rose.]
   1. (Bot.)
      (a) Of or pertaining to a natural order of plants
          ({Rosaceae}) of which the rose is the type. It
          includes also the plums and cherries, meadowsweet,
          brambles, the strawberry, the hawthorn, applies,
          pears, service trees, and quinces.
      (b) Like a rose in shape or appearance; as, a rosaceous
          corolla.
          
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   2. Of a pure purpish pink color.
      
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