Superstratum

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Superstratum \Su`per*stra"tum\, n.; pl. {Superstrata}. [NL.: cf.
     L. supersternere, superstratum, to spread upon. See {Super-},
     and {Stratum}.]
     A stratum, or layer, above another.
     [1913 Webster]