for several compounds that it was intended to preserve in the new system: methane (via methyl, which is in turn from the Greek word for wine), ethane (from ethyl coined by Justus von Liebig in 1834), propane (from propionic, which is in turn from pro- and the Greek word for fat), and butane (from butyl, which is in turn from butyric, which is in turn from the Latin word for butter). Cardinal Latin series unicycle, bicycle, tricycle, quadricycle uniped, biped, triped, quadruped, centipede, millipede Distributive Latin series unary, binary, trinary, quaternary, quinary, senary, … vicenary … centenary … denarian, vicenarian, tricenarian, quadragenarian, quinquagenarian, sexagenarian, septuagenarian, octogenarian, nonagenarian, centenarian, … millenarian Greek series monad, dyad, triad, tetrad, pentad, hexad, heptad, ogdoad, ennead, decad, ... triacontad, ... hecatontad, chiliad, myriad digon, trigon, tetragon, pentagon, hexagon, heptagon, octagon, enneagon, decagon, hendecagon, dodecagon, ... enneadecagon, icosagon, triacontagon, ... chiliagon, myriagon trilogy, tetralogy, pentalogy, hexalogy, heptalogy monopod, dipod, tripod, tetrapod, hexapod, octopod, decapod Mixed language series pentane, hexane, heptane, octane, nonane, decane, undecane, ... icosane binary, ternary, quaternary, quinary, senary, septenary, octal, nonary, decimal, duodecimal, hexadecimal, vigesimal, quadrovigesimal, duotrigesimal, sexagesimal, octogesimal See also IUPAC numerical multiplier List of numbers List of numeral systems List of commonly used taxonomic affixes Numerals in English and other languages Names for tuples of specific lengths Notes References Bibliography Prefixes Numeral systems