squared-off place

[IQU3838]

Hi,

Could anyone help me out with the underlined part?
Thank you.

"Remember monkey bars? The hot feeling in your palm, that squared-off place where your fingers meet your freshy palm?"

[JMurray]

"Remember monkey bars? The hot feeling in your palm, that squared-off place where your fingers meet your fleshy palm?"

IQU3838.
When I read your question I looked down at the palm of my hand and spread my fingers. I saw the nearly square-shaped outline of the skin between the fingers where the fingers join onto the palm. This is the part the writer is referring to, "that squared-off place".

not a teacher