tectiform UK /ˈtɛk.tɪ.fɔːm/US /ˈtɛk.tə.fɔɹm/adjective 1noun 1forms 3 adjective1 •Roof-shaped; sloping downwards on two sides from a raised central ridge. noun1 •A type of cave painting or engraving, having in its simplest form the shape of an upward-pointing wedge or arrow, thought to represent the roof of a tent or rudimentary building.The tectiforms reproduce in a remarkable manner the simple shelters, tents, and huts in use today among primitive and nomadic races in various parts of the world. — 1924 formstectiforms · more tectiform · most tectiform