tetrachord (plural tetrachords)
(music) Any set of four different pitch classes.
(music) A series of four sounds, forming a scale of two-and-a-half tones.
Source: Wiktionary
Tet"ra*chord, n. Etym: [L. tetrachordon, Gr. Tetra-) + tétrachorde.] (Anc. Mus.)
Definition: A scale series of four sounds, of which the extremes, or first and last, constituted a fourth. These extremes were immutable; the two middle sounds were changeable.
Source: Webster’s Unabridged Dictionary 1913 Edition
16 January 2025
(noun) a collection of rules or prescribed standards on the basis of which decisions are made; “they run things by the book around here”
According to Guinness World Records, the largest iced coffee is 14,228.1 liters and was created by Caffé Bene (South Korea), in Yangju, South Korea, on 17 July 2014. They poured iced black Americano on the giant cup that measured 3.3 meters tall and 2.62 meters wide.