| SESQUIALTER | • sesquialter adj. Alternative form of sesquialteral. • SESQUIALTER n. a mixture stop on an organ.
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| SESQUIOXIDE | • sesquioxide n. (Chemistry) Any oxide containing three oxygen atoms for every two atoms of another element. • SESQUIOXIDE n. an oxide with three atoms of oxygen to two of the other constituent.
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| SESQUIPEDAL | • sesquipedal adj. Measuring or containing a foot and a half. • SESQUIPEDAL adj. tending to use long or cumbersome words, also SESQUIPEDALIAN.
 • SESQUIPEDAL n. a polysyllabic word.
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| SESQUIALTERA | • sesquialtera n. (Music) A ratio of 3:2. • sesquialtera n. (Music) An organ stop that uses two ranks of different pipes.
 • SESQUIALTERA n. a perfect fifth; three notes against two; an organ stop giving the root, the twelfth and the tierce.
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| SESQUIALTERS | • SESQUIALTER n. a mixture stop on an organ. | 
| SESQUIOXIDES | • sesquioxides n. Plural of sesquioxide. • SESQUIOXIDE n. an oxide with three atoms of oxygen to two of the other constituent.
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| SESQUIPEDALS | • SESQUIPEDAL n. a polysyllabic word. | 
| SESQUITERTIA | • sesquitertia n. (Obsolete) A ratio of 4 to 3. • sesquitertia n. (Music, obsolete) A perfect fourth, an interval having the ratio of 1 to 1⅓, or 3 to 4.
 • SESQUITERTIA n. a perfect fourth; a rhythm of three notes against four.
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| SESQUIALTERAS | • sesquialteras n. Plural of sesquialtera. • SESQUIALTERA n. a perfect fifth; three notes against two; an organ stop giving the root, the twelfth and the tierce.
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| SESQUIPLICATE | • sesquiplicate adj. Magnified by one and one-half; in a ratio of three to two. • SESQUIPLICATE adj. of or as the square roots of cubes.
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| SESQUITERPENE | • sesquiterpene n. (Organic chemistry) Any terpene formed from three isoprene units, and having fifteen carbon atoms; includes… • SESQUITERPENE n. any of a group of terpene derivatives.
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| SESQUITERTIAS | • sesquitertias n. Plural of sesquitertia. • SESQUITERTIA n. a perfect fourth; a rhythm of three notes against four.
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| SESQUIPEDALIAN | • sesquipedalian n. A long word. • sesquipedalian n. A person who uses long words.
 • sesquipedalian adj. (Of a word or words) Long; polysyllabic.
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| SESQUIPEDALITY | • sesquipedality n. An instance or condition of being sesquipedalian. • SESQUIPEDALITY n. the practice of using long words.
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| SESQUISULPHIDE | • sesquisulphide n. (Chemistry) Any sulphide containing three sulphur atoms for every two metal atoms. • SESQUISULPHIDE n. a compound with three atoms of sulphur to two of the other element or radical.
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| SESQUITERPENES | • sesquiterpenes n. Plural of sesquiterpene. • SESQUITERPENE n. any of a group of terpene derivatives.
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| SESQUICARBONATE | • sesquicarbonate n. (Inorganic chemistry) A chemical compound containing three carbonate ions for every two metal ions. • sesquicarbonate n. (Inorganic chemistry) A chemical compound containing one carbonate and one bicarbonate ion in each formula…
 • SESQUICARBONATE n. a salt that is neither a simple normal carbonate nor a simple bicarbonate but often a combination of the two.
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| SESQUICENTENARY | • sesquicentenary n. A 150-year anniversary. • SESQUICENTENARY n. a hundred and fiftieth anniversary.
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| SESQUIPEDALIANS | • sesquipedalians n. Plural of sesquipedalian. • SESQUIPEDALIAN n. a polysyllabic word, also SESQUIPEDAL.
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| SESQUISULPHIDES | • sesquisulphides n. Plural of sesquisulphide. • SESQUISULPHIDE n. a compound with three atoms of sulphur to two of the other element or radical.
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