somatomammotropin
noun
so·ma·to·mam·mo·tro·pin
| \ ˌsō-mət-ə-ˌmam-ə-ˈtrōp-ᵊn, sə-ˌmat-ə-
\
\
Medical Definition of somatomammotropin
: any of several hormones (as growth hormone and prolactin) having lactogenic and somatotropic properties
especially
: placental lactogen