What does cymol mean?
Cymol is a former chemical name for what is now called p-cymene, a colourless, oily hydrocarbon belonging to the aromatic family of compounds known as alkylbenzenes. It occurs naturally as a major constituent of the essential oils of cumin and thyme, among other aromatic plants, and can be isolated by distillation. In the nineteenth century, when much of organic chemistry's vocabulary was being established, cymol appeared regularly in textbooks, journals, and pharmacopoeias as both a subject of structural study and a practical solvent. As nomenclature became standardized, the word cymene displaced cymol almost entirely, so today the term survives chiefly in historical scientific writing rather than current laboratory practice. For readers, encountering cymol is therefore a signal that one is looking at an older text, and knowing the equivalence to p-cymene allows its content to be interpreted accurately. The word also illustrates how chemical names often trace back to the natural source of a substance — in this case, ultimately the plant whose seeds gave the compound its name.
nounA colourless oily hydrocarbon, now usually called cymene (specifically p-cymene), obtained chiefly from the oils of cumin, thyme, and related plants; it was formerly used as a solvent.
- An obsolete chemical name for p-cymene (isopropyltoluene), a hydrocarbon found in cumin, thyme, and other essential oils, used historically as a solvent.
"The chemist identified cymol as the principal constituent distilled from the oil of cumin."
"Early organic chemists distilled cymol in quantity from oil of cumin."
"The nineteenth-century pharmacopoeia listed cymol among the constituents of oil of thyme."
Before chemists settled on 'cymene', this cumin-scented hydrocarbon went by a name borrowed straight from ancient Greek for cumin.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of cymol
The word derives from the Greek 'kuminon' (cumin), via Latin, reflecting the compound's discovery in oil of cumin; it entered English scientific vocabulary during the nineteenth century alongside related names such as cymene. Its cognates include the common spice-name cumin itself and the modern compound name cumene.
How cymol is actually used
Cymol is an archaic term encountered mainly in historical chemistry and old pharmacopoeias; modern literature uses cymene instead. It carries no everyday colloquial usage or strong connotations.
Easily confused with cymol
Cymene is the modern standard name for the same compound that older texts call cymol.
Thymol is a phenolic compound derived from thyme oil, whereas cymol is a plain hydrocarbon.