Definition of polymictic in English:


Pronunciation /ˌpɒlɪˈmɪktɪk/


  • 1Geology
    Of a sedimentary rock: composed of several minerals or rock types; (of a breccia) containing fragments of differing composition; (of a gravel) containing stones of greatly differing sizes.

  • 2Ecology
    Of a lake: having no stable thermal stratification but exhibiting perennial circulation.


1930s; earliest use found in Journal Sedimentary Petrology. From poly- + ancient Greek μικτός mixed + -ic.