sesquialter /-alˈtər/ adjective

(L alter second) as three to two

sesquialˈtera noun (music)

1. A perfect fifth
2. Three notes against two
3. An organ stop giving the root, the twelfth and the tierce

sesquicarˈbonate noun

A salt composed of a carbonate and a hydrogen carbonate

sesquicenteˈnary or sesquicentennˈial noun

A hundred and fiftieth anniversary (also adjective)

sesquioxˈide noun

An oxide with three atoms of oxygen to two of the other constituent

sesquipedāˈlian or sesquipˈedal adjective

1. (L sēsquipedālis, from pēs, pedis foot) tending to use long or cumbersome words
2. (of words) long, pedantic or polysyllabic (after sesquipedalia verba words a foot and a half long, coined in Horace's Ars Poetica)

sesquipedāˈlianism or sesquipedality /-pi-dalˈi-ti/ noun

sesquipˈlicate adjective (L sēsquiplex, -plicis; mathematics)

Of, or as, the square roots of the cubes

sesquisulˈphide noun

A compound with three atoms of sulphur to two of the other element or radical

sesquiterˈpene noun

Any of a group of terpene derivatives of the empirical formula C₁₅H₂₄

sesquiterˈtia noun (music)

1. A perfect fourth
2. A rhythm of three notes against four