noun
mother (honorific); wet nurse (honorific)
Dated honorific term for one's own or someone else's mother, or for a wet nurse. In modern Japanese, お母さん or 母上 are more common for 'mother', and 乳母 is used for 'wet nurse'.
昔の文書では「みおも」が母親を敬って呼ぶ言葉として使われた。
In old documents, 'みおも' was used as a respectful term for one's mother.
この物語では、みおもが幼い姫の世話をしている。
In this tale, the wet nurse (みおも) takes care of the young princess.
The common modern term for 'wet nurse'. みおも can also mean 'wet nurse' but is archaic.
The reading みおも is likely composed of the honorific prefix 御 (み) and 母 (おも), an old word for 'mother'. The exact derivation is uncertain, but it is an archaic honorific term.