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The IUPAC nomenclature of organic chemistry, for example, uses the numerical prefixes derived from Greek, except for the prefix for 9 (as mentioned) and the prefixes from 1 to 4 (meth-, eth-, prop-, and but-), which are not derived from words for numbers.
The invariant numeral quattuor ‘four’ does not fully correspond to any of its cognates in other languages, as Oscan petora ‘four’, Greek τέσσαρες téssares ‘four’, Old Irish cethair ‘four’, Gothic fidwôr ‘four’, Lithuanian keturì ‘four’, Old Church Slavonic četyre ‘four’ point to a Proto-Indo-European base ...
The Puerto Rican cuatro has ten strings in five courses, tuned in fourths from low to high, with B and E in octaves and A, D, and G in unisons: B 3 B 2 — E 4 E 3 — A 3 A 3 — D 4 D 4 — G 4 G 4. The cuatro is composed of several parts that work together to formulate the distinguishable sound of the instrument:
The Quad 4 is the first domestic regular production DOHC four-cylinder engine wholly designed and built by GM, the only similar prior example being the Chevrolet Cosworth Vega, whose DOHC head was designed by Cosworth in England. In addition to the 2.3-liter DOHC Quad 4s, there was also a short-lived 2.3-liter SOHC variant called the "Quad OHC ...
quartic or biquadratic the degree of a polynomial is 4; quad (short for quadruple or the like) several specialized sets of four, such as four of a kind in poker, a carburetor with four inputs, etc., condor in golf denotes four strokes less than par; preantepenultimate fourth from the end; 5: cinque or cinq (rare) the face of a die or playing ...
The word quadroon was borrowed from the French quarteron and the Spanish cuarterón, both of which have their root in the Latin quartus, meaning "a quarter".. Similarly, the Spanish cognate cuarterón is used to describe cuarterón de mulato or morisco (someone whose racial origin is three-quarters white and one-quarter black) and cuarterón de mestizo or castizo, (someone whose racial origin ...
Cuatro, Spanish (and other Romance languages) for the number 4, may refer to: Cuatro (instrument), a family of Latin American string instruments, including: Cuatro (Venezuela) Puerto Rican cuatro; Cuatro (TV channel), a Spanish free-to-air television channel; TV4 (Guanajuato), or TV Cuatro, a state-owned public broadcaster serving Guanajuato ...
American skater Nathan Chen performing a quad jump during his free skate at the 2018 Internationaux de France. A quadruple jump or quad is a figure skating jump with at least four (but fewer than five) revolutions. [1] All quadruple jumps have four revolutions, except for the quadruple Axel, which has four and a half