Added 10 October 2026 claypan noun Categories: Obscure Words noun ! Definition from Wiktionary (CC BY-SA). More about claypan at Wordnik → Where our words come from → A compact stratum of partially permeable material rich in clay. Origin From clay + pan. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: underclaycalicheclaystoneclumpclaybrickclayhardpanargillanclaye Back to today's word