Longman Dictionary of Contemporary English
three-ply
adjective
EXAMPLES FROM CORPUS
▪ Cast on in full needle rib, using cast on two and a three-ply or similar weight yarn.
▪ This means that you need to use a fine yarn, two- or three-ply for standard gauge machines.
The Collaborative International Dictionary
Three-ply
Three-ply \Three"-ply`\, a. Consisting of three distinct webs inwrought together in weaving, as cloth or carpeting; having three strands; threefold.
Wiktionary
three-ply
a. Having three strands or layers n. yarn having three strands
WordNet
three-ply
adj. having a thickness made up of three layers or strands; "three-ply cloth"; "three-ply yarn"
Usage examples of "three-ply".
He was wearing Emerald light-infantry armor, a tunic of three-ply greatbeast hide boiled in wax and vinegar and fastened with bronze studs, armguards of the same and high-strapped sandals.
After a few deaths, one of their bright boys figured out how to build a strong insulant house by using three-ply rubberoid, with the middle layer perforated thousands of times to create tiny air pockets.