TROPHONEMA

ˌträfəˈnēmə noun

( plural trophonema·ta -ˈnēməd.ə -ˈnem-)

Etymology: New Latin, from troph- + -nema

: one of the glandular filaments that develop from the inner uterine surface in viviparous elasmobranchs and secrete a nutritive fluid for the embryo