a transverse earthquake wave that travels through the interior of the earth and is usually the second conspicuous wave to reach a seismograph.
S wave n.
A downward deflection of the QRS complex in an electrocardiogram following an R wave.
A type of seismic body wave in which rock particles vibrate at right angles to the direction of wave travel. Secondary waves cause the rocks they pass through to change in shape. These waves are the second fastest traveling seismic waves (after primary waves) and can travel through solids but not through liquids or gases. Also called shear wave, S wave. See Note at earthquake.
See secondary wave.
noun, Mathematics. 1. See under axiom of countability. axiom of countability noun, Mathematics. 1. the property satisfied by a topological space in which the neighborhood system of each point has a base consisting of a countable number of neighborhoods (first axiom of countability) or the property satisfied by a topological space that has a base […]
- Second ballot
noun 1. an electoral procedure in which if no candidate emerges as a clear winner in a first ballot, candidates at the bottom of the poll are eliminated and another ballot is held among the remaining candidates
noun, Informal. 1. a comic who supports the leading comedian, often as a straight man, especially in burlesque or vaudeville. 2. any person who plays a secondary role or serves in a subsidiary capacity. second banana second banana see under top banana
noun, Baseball. 1. the second in order of the bases from home plate. 2. the position of the player covering the area of the infield between second and first bases.