Home › Words › P › petroformpetroformpetroform means A shape or pattern made by arranging large rocks and boulders over a relatively wide area.Among words judged in Lexicurio's Arena, petroform ranks #12,418 of 42,749 for Qualifying.EtymologyFrom petro- + form.nounA shape or pattern made by arranging large rocks and boulders over a relatively wide area.Definitions & examples from Wiktionary (CC BY-SA 3.0).Words closest in meaningBy meaning, not spelling — each word's AI semantic fingerprint, nearest first.petrogram 67% match — A painting on rock, especially one made in prehistoric times. vs petroform →petrograph 64% match — Drawing, writing or inscription on stone, as a painting on a cave wall. vs petroform →geoform 63% match — A distinct geological form vs petroform →petrosphere 63% match — Any roughly spherical artefact made of stone. vs petroform →petrogenic 60% match — Of or pertaining to the formation of rock. vs petroform →petrographic 60% match — Relating to petrographs. vs petroform →petrogenesis 58% match — Rock formation, especially the formation of igneous or metamorphic rocks. vs petroform →petrological 58% match — Of or pertaining to petrology, the study of rock formation and composition vs petroform →