An oily hydrocarbon, C4H4, of amber-yellow colour; the least volatile product of the dry distillation of caoutchouc and gutta-percha.

Any of a number of isomeric monounsaturated cyclic liquid hydrocarbons, C10H18, formally derived from menthane (terpane) by the loss of two hydrogen…

An orange or red hydrocarbon, C40H56, synthesized in several isomeric forms by carrots and many other plants, and an important source of vitamin A…

A hydrocarbon produced by the action of heated lead oxide on toluene, and in various other ways: used in dye-stuffs.

A cyclic hydrocarbon group or radical derived from mesitylene, either (CH3)2C6H3CH2— (3,5-dimethylbenzyl) or (now usually) spec. (CH3)3C6H3—…

Any of a class of saturated cyclic hydrocarbons (including cyclopentane and cyclohexane) that are present in or obtained from petroleum.

the gaseous alicyclic compound (CH2)4; also, (a compound containing) the bivalent straight-chain radical —CH2(CH2)2CH2—.

cyclohexane.

(a) the cyclic hydrocarbon cyclopentane, C5H10 (now rare); (b) the divalent straight-chain radical —(CH2)5—, present in pentamethylenediamine.

A colourless, liquid, bicyclic hydrocarbon, C14H20, obtained by the dehydration of irone.

A tetracyclic saturated hydrocarbon, C21H36, which has two stereoisomeric forms and whose molecule is the framework of those of a group of steroids…

A crystalline hydrocarbon, occurring naturally in petroleum deposits, whose molecule consists of three fused cyclohexane rings. Also: any…

A chlorinated polycyclic hydrocarbon, formerly used as an insecticide. Cf. dieldrin, n.

Any of a class of saturated hydrocarbons with a steroid structure which are found in crude oils and derived from the sterols of ancient…

a crystalline bicyclic hydrocarbon, C7H12, which is structurally similar to bornane but lacks any methyl substituents and is the parent compound…