[ noun ] (botany) any rosaceous plant of the genus Spiraea; has sprays of small white or pink flowers

[ noun ] (botany) a Japanese shrub that resembles members of the genus Spiraea; widely cultivated in many varieties for its dense panicles of flowers in many colors; often forced by florists for Easter blooming

[ noun ] (biology,botany) a dicotyledonous genus of the family Rosaceae