DICT.TW Dictionary Taiwan
Meth·ane n. Chem. A light, colorless, gaseous, inflammable hydrocarbon, CH4; marsh gas. It is the simplest of the aliphatic hydrocarbons. See Marsh gas, under Gas.
Methane series Chem., a series of saturated hydrocarbons, of which methane is the first member and type, and (because of their general chemical inertness and indifference) called also the paraffin (little affinity) series. The lightest members are gases, as methane, ethane; intermediate members are liquids, as hexane, heptane, etc. (found in benzine, kerosene, etc.); while the highest members are white, waxy, or fatty solids, as paraffin proper.
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Par·af·fin Par·af·fine, n. Chem. A white waxy substance, resembling spermaceti, tasteless and odorless, and obtained from coal tar, wood tar, petroleum, etc., by distillation. It is used in candles, as a sealing agent (such as in canning of preserves), as a waterproofing agent, as an illuminant and as a lubricant. It is very inert, not being acted upon by most of the strong chemical reagents. It was formerly regarded as a definite compound, but is now known to be a complex mixture of several higher hydrocarbons of the methane or marsh-gas series; hence, by extension, any substance, whether solid, liquid, or gaseous, of the same chemical series; thus gasoline, coal gas and kerosene consist largely of paraffins.
Note: ☞ In the present chemical usage this word is spelled paraffin, but in commerce it is commonly spelled paraffine.
Native paraffin. See Ozocerite.
Paraffin series. See Methane series, under Methane.
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methane series
n : a non-aromatic saturated hydrocarbon with the general
formula CnH(2n+2) [syn: alkane series, alkane, paraffin]