1. 卵细胞：颈卵器形似烧瓶,由颈部(neck)和腹部(venter)构成,颈部有颈沟细胞(neck canal cells),腹部有腹沟细胞(ventral canal cell)和卵细胞(egg cell). 受精时,精子以水为媒介,游到颈卵器中,与卵结合成合子,合子在颈卵器中发育成胚,

noun

1. the female reproductive cell
the female gamete

Synonym: ovum