The practice of riding on the top of elevator cars, outside the actual confines of the car.

plural of Fermi surface

An orientable surface whose boundary is a given link.

plural of Seifert surface

(electronics) a flat panel display technology that uses surface conduction electron emitters to provide electrons for every pixel. The electrons strike coloured phosphors to produce a colour image. In a general sense, an SED consists of a matrix of cathode ray tubes, each tube producing a single pixel.

(mathematics) Any surface that has the least possible surface area of those into which it could transform; typically the shapes of soap bubbles that span wire frames

(roofing) In SPF roofing, a condition of the foam in which the surface shows a linear course textured pattern and/or a pebbled surface. This surface is generally downwind of the sprayed polyurethane path and, if severe, unacceptable for proper coating and protection.

plural of datum surface

plural of caustic surface

A military (naval) vessel designed for operation on the marine surface, as distinguished from a submarine or other types of vessels. Aircraft carriers are also generally excluded.