Maybe you're looking for "wale" -- the width of the ribs corduroy ribs
Intercostal spaces
Corduroy is a thick cotton fabric with velvety ribs.
Corduroy can be a noun or an adjective. Noun: a durable woven fabric with vertical ribs. Adjective: describing something made of or resembling corduroy fabric.
The gaps between the ribs are called intercostal spaces. These spaces are occupied by intercostal muscles, which play a crucial role in the mechanics of breathing by helping to expand and contract the ribcage. Each intercostal space is numbered according to the rib above it, and they also contain nerves, blood vessels, and lymphatics.
Corduroy is a cotton fabric with ribs running lengthwise. There are two types of corduroy named according to the width of the ribbing: wide-wale and pin-wale. Jenni(Librarian-To-Be) Cole, C. W. (2016). Corduroy. In Academic World Book.
The groin
Inbetween the ribs is an acid mixture mainly made up of 75% acid and then 25% alcohol this mixture is called pobeum. so in between the ribs is pobeum.
In between human ribs are layers of intercostal muscles, nerves, and blood vessels that help support and protect the ribcage. Additionally, there is a thin layer of connective tissue called the intercostal membrane that separates each rib.
The external intercostal muscles run between the ribs. They are responsible for elevating the ribs during inhalation. The internal intercostal muscles are situated deeper and help with forced exhalation by depressing the ribs.
locate collar bone, right below is the first intercostal space then the second rib folows by second intercostal etc.
Intercostal Spaces