资料来源 : pyDict

桑葚胚形成; 桑椹胚形成

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Morulation \Mor`u*la"tion\, n. (Biol.)
   The process of cleavage, or segmentation, of the ovum, by
   which a morula is formed.