Etymology

aeroboard

A1E1R1O1B3O1A1R1D2

Today it means: Expanded polystyrene foam, such as is used in insulation. Full definition →

Irish aer
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The story

  1. Irish · derived fromaer
  2. English todayaeroboard

From aero- (or the Irish aer) + board, or from a company of a similar name which manufactures polystyrene insulation products in Ireland.

Etymology from Wiktionary, CC BY-SA 4.0.