a large expanse of very flat and smooth ocean floor, usually found at depths of 4,600 to 5,500 meters (15,000 to 18,000 feet).

To coat a metal surface with a thin layer of silver, often electrolytically.

development

(mathematics) A topological space homeomorphic to a plane (or open disk) and equipped with a hyperbolic metric.

(phonetics, of a consonant) The point of contact, where an obstruction occurs in the vocal tract between an active (moving) articulator (typically some part of the tongue) and a passive (stationary) articulator (typically some part of the roof of the mouth).

(rail transport) a stretch of railway track that does not have any junctions, crossovers or points on it.

(rail transport) to remove points and crossovers from a stretch of track.

To plate a metal with a layer of chromium

To order something; to submit an order for a product.

plural of planetary ring