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That which illuminates or affords light; as, gas and petroleum are illuminants. Boyle.

A volatile hydrocarbon, used as an illuminant, or for charging illuminating gas.

A condenser or reflector of light in optical apparatus; also, an illuminant.

ight) which is used in signaling, in pyrotechny, or in photography where a strong actinic illuminant is required. Its compounds occur abundantly, as in dolomite, talc, meerschaum, etc. Symbol Mg. Atomic weight, 24.4. Specific gravity, 1.75. Magnesium sulphate. (Chem.) Same as Epsom salts.

as a specific gravity of about 0.7, -- used as a solvent for varnishes, as a carburetant, illuminant, etc.

and obtained from coal tar, wood tar, petroleum, etc., by distillation. It is used as an illuminant and 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…

kerosene. It is obtained by distilling coal, paraffin, etc., and is used as a lubricant, illuminant, etc. [Written also photogene.]

seeds (called ramtil, or niger, seeds) which yield a valuable oil used for food and as an illuminant.

n a darkened box. -- Solar month. See under Month. -- Solar oil, a paraffin oil used an illuminant and lubricant. -- Solar phosphori (Physics), certain substances, as the diamond, siulphide of barium (Bolognese or Bologna phosphorus), calcium sulphide, etc., which become phosphorescent, and shine in the dark, after…