premature
adjective
pre·ma·ture
| \ ˌprē-mə-ˈtyu̇r
, -ˈtu̇r, -ˈchu̇r also ˌpre-
\
, -ˈtu̇r, -ˈchu̇r also ˌpre-
\
Definition of premature
: happening, arriving, existing, or performed before the proper, usual, or intended time
especially
: born after a gestation period of less than 37 weeks
premature babies