phenobarbital

American  

[fee-noh-bahr-bi-tawl, -tal, -nuh-] / ˌfi noʊˈbɑr bɪˌtɔl, -ˌtæl, -nə- /

especially British, phenobarbitone

noun

Pharmacology.

1. a white, crystalline powder, C 1 2 H 1 2 N 2 O 3 , used as a sedative, a hypnotic, and as an antispasmodic in epilepsy.

---

phenobarbital British  

/ ˌfiːnəʊˈbɑːbɪtəl /

noun

1. a white crystalline derivative of barbituric acid used as a sedative for treating insomnia and as an anticonvulsant in epilepsy. Formula: C 12 H 12 N 2 O 3

---

phenobarbital Scientific  

/ fē′nō-bär′bĭ-tôl′,-tăl′ /

1. A crystalline barbiturate used as a sedative and an anticonvulsant. Chemical formula: C ₁₂ H ₁₂ N ₂ O ₃ .

---

Etymology

Origin of phenobarbital

First recorded in 1915–20; pheno- + barbital