| Mawson, C.O.S., ed. (18701938). Rogets International Thesaurus. 1922. |
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| Class I. Words Expressing Abstract Relations | | Section V. Number | | 2. Determinate Number |
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| 96. Quadruplication. |
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| NOUN: | QUADRUPLICATION.
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| VERB: | QUADRUPLICATE, biquadrate, multiply by four.
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| ADJECTIVE: | FOURFOLD; quadrable, quadruple, quadruplex, quadruplicate, quadrible; fourth.
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| ADVERB: | FOUR TIMES; in the fourth place, fourthly.
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