(ˈ)del|tāik adjective
or del·tic ˈ ̷ ̷tik
Etymology: delta (I) + -ic
1. : of, like, relating to, or typical of a delta
deltaic deposits
deltaic accumulation of silt
also : constituting a delta
a deltaic area
2. often capitalized : arising or originating in the Nile delta
early deltaic civilization
the Deltaic dynasties of ancient Egypt