Main Entry: stro·mat·o·lite

Pronunciation: \strō-ˈma-tə-ˌlīt\

Function: noun

Etymology: Latin stromat-, stroma bed covering + English -o- + -lite

Date: 1930

: a laminated usually mounded sedimentary fossil formed from layers of cyanobacteria, calcium carbonate, and trapped sediment

— stro·mat·o·lit·ic \-ˌma-tə-ˈli-tik\ adjective