loop (in plural lula'oth (Ex 26:4 f,Ex 10:1-29 f; Ex 36:11 f,Ex 17:1-16)): A ring or fold made of blue thread to fasten into the corresponding golden clasps, or taches upon the curtains of the tabernacle, joining them in sets, or pairs.
⇒See the definition of loop in the KJV Dictionary
See TABERNACLE.