Alternative form of Alfven surface

Alternative form of surface-mount

Alternative form of surface-mount

(stellar astronomy) The outer edge of the corona. The boundary that separates a star's atmosphere from its exosphere (heliosphere, astrosphere), where Alfven waves transition into stellar wind (solar wind).

(geometry) All of the sides of the object, excluding its base and top (when they exist).

(electronics) Of electronic components, able to be soldered on top of printed circuit boards.

A partial discharge that appears at the boundary of different insulators when there are changes in the electric field.

(nautical, military) A warship that floats on the surface of the ocean, as opposed to a submarine. Aircraft carriers are also generally excluded.

(differential geometry) A unit vector at any given point P of a surface M which is perpendicular to the tangent plane T_P(M) of M at P. For a surface with parametrization ⃑x(u,v), it is given by

(mathematics) A surface formed when a given curve is revolved around a given axis. If the resulting surface is a closed one, it also defines a solid of revolution.