pro.nu.cle.usn.(名词)【复数】 pro.nu.cle.i[-klô-o.] The haploid nucleus of a sperm or egg before fusion of the nuclei in fertilization.原核,前核:在受精细胞核结合之前,精子或卵子的单倍体细胞核【引伸】pronu.clearadj.(形容词)