strōˈmad. ə lˌīt noun
( -s )
Etymology: alteration of stromatolith , from New Latin stromat- , stroma + International Scientific Vocabulary -o- + -lith ; originally formed in German
: a laminated usually mounded sedimentary fossil formed from layers of blue-green algae, calcium carbonate, and trapped sediment
• stro·mat·o·lit·ic -ˌmad. ə lˈid.ik adjective