رَتَقٌ

It is [also] plural [or rather coll. gen. n.] of رَتَقَةٌ, synonym, according to the copies of the K, with رُتْبَةٌ, but correctly with رَتَبَةٌ, which signifies The space between [any two of] the fingers: mentioned [in the JK, where I find the correct reading, and] by Ibn-'Abbád. (TA.)