Al·ex·an·dri·an senna /ˌælɪgˌzændrɪən, ˌɛl-/ 名詞
  Alexandrian senna
       n : erect shrub having racemes of tawny yellow flowers; the
           dried leaves are used medicinally as a cathartic;
           sometimes placed in genus Cassia [syn: Alexandria senna,
            true senna, tinnevelly senna, Indian senna, Senna
           alexandrina, Cassia acutifolia, Cassia augustifolia]