Numeral prefix

<p>Numeral or number prefixes are <a href="/facts/Prefix/C4Lw8npg">prefixes</a> derived from <a href="/facts/Numeral_(linguistics)/9Pzgh1Rp">numerals</a> or occasionally other <a href="/facts/Number/auQSAE2m">numbers</a>. In English and many other languages, they are used to coin numerous series of words. For example:
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<ul><li><a href="/facts/Triangle/cRXUwsMn">triangle</a>, <a href="/facts/Quadrilateral/QCGqrkp2">quadrilateral</a>, <a href="/facts/Pentagon/xoq5oJeQ">pentagon</a>, <a href="/facts/Hexagon/DPzuCzWE">hexagon</a>, <a href="/facts/Octagon/H5PuP3wP">octagon</a> (shape with 3 sides, 4 sides, 5 sides, 6 sides, 8 sides)</li>
<li><a href="/facts/Simplex_communication/vS2RBGI8">simplex</a>, <a href="/facts/Duplex_(telecommunications)/LCULeVxr">duplex</a> (communication in only 1 direction at a time, in 2 directions simultaneously)</li>
<li><a href="/facts/Unicycle/MDf0yPAw">unicycle</a>, <a href="/facts/Bicycle/nxBVrlBF">bicycle</a>, <a href="/facts/Tricycle/CX4t4Tkp">tricycle</a> (vehicle with 1 wheel, 2 wheels, 3 wheels)</li>
<li>dyad, triad, tetrad (2 parts, 3 parts, 4 parts)</li>
<li><a href="/facts/Twin/9QSssff4">twins</a>, <a href="/facts/Multiple_birth/bVVVhRvs">triplets</a>, <a href="/facts/Multiple_birth/bVVVhRvs">quadruplets</a> (multiple birth of 2 children, 3 children, 4 children)</li>
<li><a href="/facts/Biped/tvLMG77t">biped</a>, <a href="/facts/Quadruped/KMVYdsYf">quadruped</a>, hexapod (animal with 2 feet, 4 feet, 6 feet)</li>
<li>September, October, November, December (<a href="/facts/September_(Roman_month)/uQjLI4V5">7th month</a>, <a href="/facts/October_(Roman_month)/y9W1Dqhd">8th month</a>, <a href="/facts/November_(Roman_month)/pptMRSU1">9th month</a>, <a href="/facts/December_(Roman_month)/BUoGbW8X">10th month</a>)</li>
<li><a href="/facts/Binary_number/a6JDSRPs">binary</a>, <a href="/facts/Ternary_number/bMUfR74P">ternary</a>, <a href="/facts/Octal_number/4nRcq0Ce">octal</a>, <a href="/facts/Decimal/7omfVNIM">decimal</a>, <a href="/facts/Hexadecimal/02ohQW22">hexadecimal</a> (numbers expressed in base 2, base 3, base 8, base 10, base 16)</li>
<li>septuagenarian, octogenarian (a person 70–79 years old, 80–89 years old)</li>
<li><a href="/facts/Centipede/y09azluh">centipede</a>, <a href="/facts/Millipede/zqL7dyMl">millipede</a>, <a href="/facts/Myriapoda/JmufXFt7">myriapod</a> (subgroups of <a href="/facts/Arthropod/JKJLTFzp">arthropods</a> with numerous feet, suggesting but not implying approximately 100, 1000, and 10000 feet respectively)</li></ul>
<p>In many European languages there are two principal systems, taken from <a href="/facts/Latin/pM3Kge85">Latin</a> and <a href="/facts/Greek_language/pzDd6eIz">Greek</a>, each with several subsystems; in addition, <a href="/facts/Sanskrit/ychfjhlx">Sanskrit</a> occupies a marginal position. There is also an international set of <a href="/facts/Metric_prefix/Y2MzkaeL">metric prefixes</a>, which are used in the world's <a href="/facts/Metric_system/to24H0YK">standard measurement system</a>.
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Numeral prefix open-in-new

Numeral prefix