phenothiazine

American  

[fee-nuh-thahy-uh-zeen, -zin] / ˌfi nəˈθaɪ əˌzin, -zɪn /

noun

1. Chemistry. a grayish-green to greenish-yellow, crystalline, water-insoluble solid, C 1 2 H 9 NS, used chiefly as an insecticide and vermifuge, and in the synthesis of pharmaceuticals.

2. Pharmacology. any of a class of medications used principally to treat psychotic symptoms, as delusions or hallucinations, and excessive excitability.

---

phenothiazine British  

/ ˌfiːnəʊˈθaɪəziːn /

noun

1. a colourless to light yellow insoluble crystalline compound used as an anthelmintic for livestock and in insecticides. Formula: C 12 H 9 NS

2. any of several drugs derived from phenothiazine and used as strong tranquillizers and in the treatment of schizophrenia

---

phenothiazine Scientific  

/ fē′nō-thī′ə-zēn′ /

1. A yellow or green, toxic organic compound used in insecticides and dyes and to treat infections with worms and other parasites in livestock. Chemical formula: C ₁₂ H ₉ NS.

2. Any of a group of drugs derived from this compound. Phenothiazines are dopamine antagonists and are used in the treatment of psychiatric disorders, such as schizophrenia.

---

Etymology

Origin of phenothiazine

First recorded in 1890–95; pheno- + thiazine

Example Sentences

Compounds like phenothiazine, thianthrene and thienothiophene, containing organosulfur skeletons, play pivotal roles in these domains.

From Science Daily • May 23, 2024

Later tests with more finely ground phenothiazine turned out much better.

From Time Magazine Archive

Early failures in field tests with phenothiazine were found to be due to the size of the particles.

From Time Magazine Archive

Another new insecticide, phenothiazine, has been found extraordinarily effective against tent caterpillars, cattle ticks, Mexican bean beetles, corn borers, many another pest.

From Time Magazine Archive

DDT, methoxychlor, malathion, phenothiazine, and various dinitro compounds are among the numerous pesticides that have been found to inhibit one or more of the enzymes concerned in the cycle of oxidation.

From "Silent Spring" by Rachel Carson