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| | Numerical Prefix - NaturalResearch.com (Site not responding. Last check: ) |
 | | They occur in 19th, 20th and 21st century coinages, mainly the terms that are used in relation to or that are the names of technological innovations, such as hexadecimal and bicycle. |
 | | Systematic names use numerical prefixes derived from Greek, with one principal exception, nona-. |
 | | The IUPAC nomenclature of organic chemistry, for example, uses the numerical prefixes derived from Greek, except for the prefix for 9 (as mentioned) and the prefixes from 1 to 4 (meth-, eth-, prop-, and but-), which are not derived from words for numbers. |
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