I. -ˈli-tə-rəl; ˌsəb-ˌli-tə-ˈral, -ˈräl adjective
Date: 1846
1. : situated, occurring, or formed on the aquatic side of a shoreline or littoral zone
2. : constituting the sublittoral
II. noun
Date: circa 1935
: the deeper part of the littoral portion of a body of water ; especially : the region in an ocean between the lowest point exposed by a low tide and the margin of the continental shelf