phallus       
noun [ C ]  formal uk/ˈfæl.əs/ us/ˈfæl.əs/
 (尤指象征生殖力的)阴茎图像,阴茎模型
an image or a model of the penis, especially one representing the power of men to make women pregnant, or a penis
  These primitive peoples are believed to have worshipped the phallus as a symbol of regeneration. 据信这些原始人崇拜阴茎形象,把它视为繁衍的象征。