plural of seven-layer cake

plural of seven-layer dip

plural of seven-layer salad

(geology) A stratum laid down prior to that of a saline layer (formed from encroachment by a sea)

A layer of ionized gas occurring between roughly 90–150 km (56–93 mi) above the ground. It reflects medium-frequency radio waves, and thus enables them to be propagated beyond the horizon.

(oceanography) A layer of the ocean lying usually 300-500 metres deep composed of dense concentrations of pelagic animal life, that moves depending on the time of day, up at night and down during the day. It sometimes appear as if it were the seabed on sonar scopes, due to the density of life in the layer.

Alternative form of L2TP

Alternative form of L2TP