Definition of "glaucous"

I realised I was the only shopper in that rather eerie place where I moved about fishlike, in a glaucous aquarium […]

1955, Vladimir Nabokov, Lolita

[…] inside you could see the wires and cables that ran aft to the rudder and elevators and the cracked and curled and sunblacked leather of the seats and in their tarnished nickel bezels the glass of instrument dials glaucous and clouded from the pumicing of the desert sands.

1994, Cormac McCarthy, The Crossing

Traveling at sea for the first time is a chance to realize that the ocean is not one ocean. The water changes. The Atlantic that seethes off the eastern U.S. is glaucous and lightless and looks mean. Around Jamaica, though, it’s more like a milky aquamarine, and translucent.

1997, David Foster Wallace, “A Supposedly Fun Thing I'll Never Do Again”, in A Supposedly Fun Thing I'll Never Do Again, Kindle edition, Little, Brown Book Group