See Also: octane(medicine)
octane(dictionary)
octane(dictionary)
high-octane(dictionary)
Octane - Motor Sports(gambling)

octane (iou)



octane noun. L19.
[from OCTA- + -ANE.]
1. Chemistry. Any of a series of saturated hydrocarbons (alkanes) with the formula C8H18; esp. (also n-octane) the unbranched isomer, CH3(CH2)6CH3. Cf. ISOOCTANE. L19.
2. ellipt. An octane number. Usu. with preceding numeral or adjective, as 105 octane, high octane. M20.
Comb.: octane number, octane rating a number indicating the antiknock properties of a motor or aviation fuel, equal to the percentage by volume of isooctane in an isooctane/heptane mixture of equivalent performance, or (for numbers above 100) to the number of millilitres of tetraethyl lead per gallon of isooctane required to give an equivalent performance.
octa'noate noun a salt or ester of octanoic acid M20.
octa'noic adjective:
octanoic acid, any unsaturated fatty acid of the formula C7H15COOH, of which several isomers exist; spec. = CAPRYLIC acid: E20.
octanoyl noun a radical of the formula C7H15CO; spec. = CAPRYLYL: M20.