gompholiteGeol.|ˈgɒmfəlaɪt| [f.Gr. γόµϕος bolt, nail: see -lite. (Named by Brongniart.)] (See quot. 1839.) 1838Penny Cycl. XI. 296/2. 1839 G. Roberts Dict.Geol., Gompholite, a conglomerate of the tertiary formation, in which the imbedded pebbles appear like nails in a baronial door.1859in Page Handbk.Geol. Terms.