English-Thai Dictionary
naphthalene
N ผลึก สี ขาว ที่ ได้ จาก น้ำมันดิน
Webster's 1913 Dictionary
NAPHTHALENE
NAPHTHALENE Naph "tha *lene, n. (Chem. )
Defn: A white crystalline aromatic hydrocarbon, C1 H8, analogous to benzene, and obtained by the distillation of certain bituminous materials, such as the heavy oil of coal tar. It is the type and basis of a large number of derivatives among organic compounds.Formerly called also naphthaline. Naphthalene red (Chem. ), a dyestuff obtained from certain diazo derivatives of naphthylamine, and called also magdala red. -- Naphthalene yellow (Chem. ), a yellow dyestuff obtained from certain nitro derivatives of naphthol.
New American Oxford Dictionary
naphthalene
naph tha lene |ˈnafTHəˌlēn, ˈnap- ˈnæpθəˌlin ˈnæfθəˌlin | ▶noun Chemistry a volatile white crystalline compound produced by the distillation of coal tar, used in mothballs and as a raw material for chemical manufacture. [A bicyclic aromatic hydrocarbon; chem. formula: C 10 H 8. ] DERIVATIVES naph thal ic |nafˈTHalik, nap- |adjective ORIGIN early 19th cent.: from naphtha + -ene, with the insertion of -l- for ease of pronunciation.
Oxford Dictionary
naphthalene
naphthalene |ˈnafθəliːn | ▶noun [ mass noun ] Chemistry a volatile white crystalline compound produced by the distillation of coal tar, used in mothballs and as a raw material for chemical manufacture. ●A bicyclic aromatic hydrocarbon; chem. formula: C 10 H 8. DERIVATIVES naphthalic |-ˈθalɪk |adjective ORIGIN early 19th cent.: from naphtha + -ene, with the insertion of -l- for ease of pronunciation.
The Wordsmith Dictionary