wet nurse

US /ˈwet nɜːrs/
UK /ˈwet nɜːrs/
"wet nurse" picture
1.

a woman who breastfeeds and cares for another's child

:
In some cultures, it was common for wealthy families to employ a wet nurse.
The baby thrived under the care of the kind wet nurse.
1.

to breastfeed and care for another's child

:
She agreed to wet nurse her sister's baby while her sister recovered.
It was a common practice in the past to wet nurse children from other families.