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A: The bottom of a concave meniscus. B: The top of a convex meniscus.Notional section through Meniscus lens, showing it to be concavo-convex, with a positive focus because it is thicker in the middle than the edge
1959, Anthony Burgess, Beds in the East (The Malayan Trilogy), published 1972, page 554:
And from Crabbe's own forehead sweat dripped or gathered into a kind of meniscus to be scooped off.
1972, Vladimir Nabokov, Transparent Things, McGraw-Hill, published 1972, page 19:
He opened wide both casements; they gave on a parking place four floors below; the thin meniscus overhead was too wan to illumine the roofs of the houses descending toward the invisible lake [...].
(optics) A lens which is convex on one side and concave on the other, being crescent-shaped in cross-section.
