spermiogenesis
noun
sper·mio·gen·e·sis ˌspər-mē-ō-ˈje-nə-səs 
: spermatogenesis
specifically : transformation of a spermatid into a spermatozoon
Word History
Etymology
New Latin, from spermium spermatozoon + -o- + Latin genesis
First Known Use
1916, in the meaning defined above
Medical Definition
spermiogenesis
noun
sper·mio·gen·e·sis ˌspər-mē-ō-ˈjen-ə-səs
plural spermiogeneses -ˌsēz
1
: spermatogenesis
2
: transformation of a spermatid into a spermatozoon