The Scottish term for a low-lying meadow by a river is typically called a "haugh."
Playground, meadow, plaza.
Aside from the Latin, the most common term for lying on your back is supine.
skelp
bairn
No, "mi ma" is not a Scottish term for grandma. In Scotland, the term for grandmother is often "granny," "nana," or "gaga." "Mi ma" could be a variation or a term used in specific familial contexts, but it is not widely recognized as a standard term for grandmother in Scottish dialect.
Orthopnea is the medical term meaning shortness of breath when lying flat.
teuchter
bubbly jack
No, it's French.
The term is collinear.
philanthrope