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

See also: thick

• interparietal suture
• interpellate
• interpellation
• interpenetrate
• interpenetration
• interpersonal
• interpersonal chemistry
• interphalangeal joint
• interphase
• interphone
• interplanetary
• interplanetary dust
• interplanetary gas
• interplanetary medium
• interplanetary space
• interplay
• interpleader
• Interpol
• interpolate
• interpolation
• interpolator
• interpose
• interposition
• interpret
• interpretable