17 relations: Defensive back, Flight feather, Food web, Mesozoic, Primary, Second (disambiguation), Secondary (chemistry), Secondary chord, Secondary color, Secondary crater, Secondary education, Secondary electrons, Secondary emission, Secondary market, Secondary mirror, Secondary school, Transformer.
In American football and Canadian football, defensive backs (DBs) are the players on the defensive team who take positions somewhat back from the line of scrimmage; they are distinguished from the defensive line players and linebackers, who take positions directly behind or close to the line of scrimmage.
Flight feathers (Pennae volatus) are the long, stiff, asymmetrically shaped, but symmetrically paired pennaceous feathers on the wings or tail of a bird; those on the wings are called remiges, singular remex, while those on the tail are called rectrices, singular rectrix.
A food web (or food cycle) is a natural interconnection of food chains and a graphical representation (usually an image) of what-eats-what in an ecological community.
The Mesozoic Era is an interval of geological time from about.
Primary may refer to.
A second is a unit of time.
Secondary is a term used in organic chemistry to classify various types of compounds (e. g. alcohols, alkyl halides, amines) or reactive intermediates (e. g. alkyl radicals, carbocations).
A secondary chord is an analytical label for a specific harmonic device that is prevalent in the tonal idiom of Western music beginning in the common practice period, the use of diatonic functions for tonicization. In the tonal idiom, a song or piece of music has a tonic note and chord, which is based on the root of the key that the piece is in. The most important chords in a tonal song or piece are the tonic chord (labeled as I in harmonic analysis) and the dominant chord (V). A piece or song is said to be in the key of the tonic. In the key of C major, the tonic chord is C major and the dominant chord is G. Chords are named after the function they serve and their position (for example, the "dominant" is considered the most important after the tonic and the "subdominant" is the same distance from the tonic as the dominant but below rather than above) and numbered by the scale step of the chord's base note (the root of the vi chord is the sixth scale step). Secondary chords are altered or borrowed chords, chords which are not in the key. Secondary chords are referred to as the function they are serving of the key or chord to which they function and written "function/key". Thus, the dominant of the dominant is written "V/V" and read as, "five of five," or, "dominant of the dominant". Any scale degree with a major or minor chord on it may have any secondary function applied to it; secondary functions may be applied to diminished triads in some special circumstances. Secondary chords were not used until the Baroque period and are found more frequently and freely in the Classical period, even more so in the Romantic period, and, although they began to be used less frequently with the breakdown of conventional harmony in modern classical music, secondary dominants are a "cornerstone," of popular music and jazz of the 20th century.Benward & Saker (2003), p.273-7.
A secondary color is a color made by mixing two primary colors in a given color space.
Secondary craters are impact craters formed by the ejecta that was thrown out of a larger crater.
Secondary education covers two phases on the International Standard Classification of Education scale.
Secondary electrons are electrons generated as ionization products.
Secondary emission in physics is a phenomenon where primary incident particles of sufficient energy, when hitting a surface or passing through some material, induce the emission of secondary particles.
The secondary market, also called the aftermarket and follow on public offering is the financial market in which previously issued financial instruments such as stock, bonds, options, and futures are bought and sold.
A secondary mirror (or secondary) is the second deflecting or focusing mirror element in a reflecting telescope.
A secondary school is both an organization that provides secondary education and the building where this takes place.
A transformer is a static electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.