Source : Webster's Revised Unabridged Dictionary (1913)

Cycas \Cy"cas\ (s?"k?s), n. [Of uncertain origin. Linn[ae]us
   derives it from one of the ``obscure Greek words.''] (Bot.)
   A genus of trees, intermediate in character between the palms
   and the pines. The pith of the trunk of some species
   furnishes a valuable kind of sago.

Source : WordNet®

Cycas
     n : type genus of Cycadaceae: genus of widely distributed Old
         World evergreen tropical trees having pinnate leaves and
         columnar stems covered with persistent bases of old
         leaves [syn: {genus Cycas}]