No one knows the exact cause of psoriasis, but experts believe that itâs a combination of things. Something wrong with the immune system causes inflammation, triggering new skin cells to form too quickly. Normally, skin cells are replaced every 10 to 30 days. With psoriasis, new cells grow every 3 to 4 days. The buildup of old cells being replaced by new ones creates those silver scales.
Wiktionary(0.00 / 0 votes)Rate this definition: 1  abyss(Noun) A bottomless or unfathomed depth, gulf, or chasm; hence, any deep, immeasurable. 2  abyss(Noun) Hell; the bottomless pit; primeval chaos. 3  abyss(Noun) Infinite time; a vast intellectual or moral depth. 4  abyss(Noun) The center of an escutcheon.
Abyssal zone. The abyssal zone or abyssopelagic is a layer of the pelagic zone of the ocean. Abyss derives from the Greek word á¼Î²ÏÏÏÎ¿Ï, meaning bottomless. At depths of 4,000 to 6,000 metres (13,123 to 19,685 feet), this zone remains in perpetual darkness and never receives daylight.