forty-ninth parallel 
The parallel of latitude 49° north of the equator, especially as forming the boundary between Canada and the US west of the Lake of the Woods.
- Mother General
- mother goddess
- Mother Goose
- mother hen
- motherhood
- motherhood and apple-pie
- mother house
- Mother Hubbard
- mother image
- mother imago
- mother-in-babe
- Mothering Day
- mothering pen
- Mothering Sunday
- mothering-up pen
- mother-in-law
- mother-in-law joke
- mother-in-law seat
- mother-in-law's tongue
- motherish
- mother kingdom
- motherkins
- mother kirk
- motherland
- Motherland Party