Definitions for "Foam core"
or foam board – A light, stiff board made of styrofoam with paper laminated onto both sides.
Paper exteriorsandwiching rigid foam often used for show signage.
Corrugated material sandwiching rigid foam used often for show signage.
Various nonmetallic pipes where porosity has been induced into the pipe's cross section to reduce weight and cost. Sometimes referred to as coax piping.