The Collaborative International Dictionary of English v.0.48:
Drynurse \Dry"nurse`\, dry-nurse \dry"-nurse`\, v. t. To feed, attend, and bring up without breastfeeding it. --Hudibras. [1913 Webster]WordNet (r) 3.0 (2006):
dry-nurse v 1: take care of an infant without breastfeeding it