1. Having a thickness made up of four layers or strands
   "four-ply yarns"

See also: thick

• Louis Charles Alfred de Musset
• Louis Comfort Tiffany
• louis d'or
• Louis d'Outremer
• Louis Eugene Felix Néel
• Louis Harold Gray
• Louis Henri Sullivan
• Louis Henry Sullivan
• Louis I
• Louis II
• Louis III
• Louis Isadore Kahn
• Louis IV
• Louis IX
• Louis Jacques Mande Daguerre
• Louis Joliet
• Louis Jolliet
• Louis le Begue
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• Louis Leakey
• Louis Pasteur
• Louis Seymour Bazett Leakey
• Louis Stanton Auchincloss
• Louis Sullivan