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Numerical prefixes occur in five contexts:

They occur in .

They occur in constructed words such as .

They occur as prefixes to units of measure in the SI system. See SI Prefix es.

They occur as prefixes to units of computer data. See Binary Prefixes .

They occur in words in the same languages as the original number word, and their respective derivatives. (Strictly speaking, some of the common citations of these occurrences are ''not'' in fact occurrences of the prefixes. For example: .)

Because of the common inheritance of Greek and Latin roots across the Romance Language s, the import of much of that derived vocabulary into non-Romance languages (such as into English via Norman French ), and the Borrowing of 19th and 20th century coinages into many languages, the same numerical prefixes occur in many languages.

Numerical prefixes are not restricted to denoting integers. Some of the SI prefixes denote negative powers of 10, i.e. division by a multiple of 10 rather than multiplication by it. Several common-use numerical prefixes denote Vulgar Fraction s.

Words comprising non-technical numerical prefixes are usually not hyphenated. This is not an absolute rule, however, and there are exceptions. (For example: .) There are no exceptions for words comprising technical numerical prefixes, though. Systematic Name s and words comprising SI Prefix es and Binary Prefix es are not hyphenated, by definition.

Nonetheless, for clarity, dictionaries list numerical prefixes in hyphenated form, to distinguish the prefixes from words with the same spellings (such as ).

Several technical numerical prefixes are not derived from words for numbers. (, for example. See its etymology for details.)

The root language of a numerical prefix need not be related to the root language of the word that it prefixes. Some words comprising numerical prefixes are Hybrid Word s.

TABLE OF NON-TECHNICAL NUMERIC PREFIXES

This also includes the technical numeric prefixes used for Systematic Name s. For tables of other technical numeric prefixes, see SI Prefix es and Binary Prefix es.

Notes

Sometimes the prefixes are cited as though they were the original words themselves. The prefixes derived from Greek are not only in the wrong alphabet, but also differ from the actual corresponding Greek words. See the individual word etymologies for the actual number words.

The prefixes in this column are also Unbound Morpheme s.

The distinction between Latin and Greek is blurred in the case of 8. Unlike the other numbers, there was little divergence between Latin and Greek in the words for 8. Whilst can be considered to be derived from both Greek and Latin.

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