[fee-noh-bahr-bi-tawl, -tal, -nuh-] /ˌfi noʊˈbɑr bɪˌtɔl, -ˌtæl, -nə-/
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.
a white crystalline derivative of barbituric acid used as a sedative for treating insomnia and as an anticonvulsant in epilepsy. Formula: C12H12N2O3
1919, from pheno- + barbital (see barbiturate).
phenobarbitone phe·no·bar·bi·tone (fē’nō-bär’bĭ-tōn’)
phenobarbital phe·no·bar·bi·tal (fē’nō-bär’bĭ-tôl’, -tāl’)
A crystalline barbiturate used as a sedative, a hypnotic, and an anticonvulsant.
A crystalline barbiturate used as a sedative and an anticonvulsant. Chemical formula: C12H12N2O3.
[fee-nuh-kop-ee] /ˈfi nəˌkɒp i/ noun, plural phenocopies. Genetics. 1. the observed result of an environmentally induced, nongenetic alteration of a phenotype to a form that resembles the expression of a known genetic mutation. /ˈfiːnəʊˌkɒpɪ/ noun (pl) -copies 1. a noninheritable change in an organism that is caused by environmental influence during development but resembles the […]
[fee-nuh-krist, fen-uh-] /ˈfi nə krɪst, ˈfɛn ə-/ noun, Petrology. 1. any of the conspicuous in a porphyritic rock. /ˈfiːnəˌkrɪst; ˈfɛn-/ noun 1. any of several large crystals that are embedded in a mass of smaller crystals in igneous rocks such as porphyry phenocryst (fē’nə-krĭst’) A large crystal that is surrounded by a finer-grained matrix in […]
phenodeviant phe·no·de·vi·ant (fē’nō-dē’vē-ənt) n. An individual with a phenotype significantly different from that of the population to which it belongs.
[fee-nuh-gram] /ˈfi nəˌgræm/ noun, Biology. 1. a diagram depicting taxonomic relationships among organisms based on overall similarity of many characteristics without regard to evolutionary history or assumed significance of specific characters: usually generated by computer.