from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The portion of a natural essential oil that separates out as a white, crystalline solid on cooling or standing.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The more solid ingredient of certain volatile oils, contrasted with elaeoptene.
from the GNU version of the Collaborative International Dictionary of English
- n. The more solid ingredient of certain volatile oils; -- contrasted with elæoptene.
from The Century Dictionary and Cyclopedia
- n. The solid crystalline substance separated from any volatile oil on long standing or at low temperatures. See elæoptene.
Officinally Thymol, the stearoptene obtained from the volatile oil of
This increase in the proportion of stearoptene is also shown by the progressively heightened fusing-point of rose oils from different sources: thus, while Bulgarian oil fuses at about 61° to 64°
Almost the only material used for artificially heightening the apparent proportion of stearoptene is said to be spermaceti, which is easily recognizable from its liability to settle down in a solid cake, and from its melting at 122° Fahr., whereas stearoptene fuses at 91. 4° Fahr.
The French otto is richer in stearoptene than the Turkish, nine grammes crystallizing in a liter (1¾ pint) of alcohol at the same temperature as 18 grammes of the Turkish.
The crystals of rose-stearoptene are light, feathery, shining plates, filling the whole liquid.
When hard spring water is employed, the otto is rich in stearoptene, but less transparent and fragrant.
The odoriferous constitutent of the otto is a liquid containing oxygen, the solid hydrocarbon or stearoptene, with which it is combined, being absolutely devoid of perfume.