| forequarter | (noun) the front half of a side of meat | - |
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| frequence | (noun) the number of occurrences within a given time period | Synonyms: frequency, oftenness |
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| frequency | (noun) the number of observations in a given statistical category | Synonyms: absolute frequency |
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| (noun) the ratio of the number of observations in a statistical category to the total number of observations | Synonyms: relative frequency |
| (noun) the number of occurrences within a given time period | Synonyms: frequence, oftenness |
| frequentative | (noun) a verb form that serves to express frequent repetition of an action | - |
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| frequenter | (noun) a regular customer | Synonyms: patron |
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| infrequency | (noun) noteworthy scarcity | Synonyms: rareness, rarity |
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| lambrequin | (noun) short and decorative hanging for a shelf edge or top of a window casing | - |
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| (noun) a scarf that covers a knight's helmet | - |
| prerequisite | (noun) something that is required in advance | Synonyms: requirement |
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| request | (noun) the verbal act of requesting | Synonyms: asking |
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| (noun) a formal message requesting something that is submitted to an authority | Synonyms: petition, postulation |
| requester | (noun) one praying humbly for something | Synonyms: petitioner, suppliant, supplicant |
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| requiem | (noun) a song or hymn of mourning composed or performed as a memorial to a dead person | Synonyms: coronach, dirge, lament, threnody |
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| requiescat | (noun) a prayer for the repose of the soul of a dead person | - |
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| requirement | (noun) something that is required in advance | Synonyms: prerequisite |
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| (noun) required activity | Synonyms: demand |
| (noun) anything indispensable | Synonyms: essential, necessary, necessity, requisite |
| requisite | (noun) anything indispensable | Synonyms: essential, necessary, necessity, requirement |
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| requisiteness | (noun) the state of being absolutely required | - |
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| requisition | (noun) seizing property that belongs to someone else and holding it until profits pay the demand for which it was seized | Synonyms: sequestration |
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| (noun) the act of requiring; an authoritative request or demand, especially by a military or public authority that takes something over (usually temporarily) for military or public use | - |
| (noun) an official form on which a request is made | Synonyms: requisition form |
| requital | (noun) an act of requiting; returning in kind | Synonyms: payment |
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| (noun) a justly deserved penalty | Synonyms: retribution |