Definitions for oldwifeˈɒldˌwaɪf
Random House Webster's College Dictionary
any of various fishes, as the alewife or menhaden.
Ref: old squaw.
Origin of oldwife:
queen triggerfish, Bessy cerca, oldwench, oldwife, Balistes vetula(noun)
tropical Atlantic fish
old squaw, oldwife, Clangula hyemalis(noun)
a common long-tailed sea duck of the northern parts of the United States