testaceotheology /ˌtɛs.tə.si.oʊ.θiˈɒl.ə.dʒi/ noun1 •The "theology of shellfish", or the study of divine or spiritual significance attributed to shellfish, such as clams, oysters, and other mollusks.Chemnitz was a promoter of a form of natural theology known as testaceotheology or the use of molluscs for preaching. — 2025