One of the mysteries of the English language finally explained.
1(in card games, especially bridge) a pair of cards which are the only cards of their suit in a hand.as modifier ‘a doubleton ace’
- ‘In a trump contract, the play of a higher card followed by a lower one may be made from a doubleton, indicating a desire to ruff, rather than just from a holding including a high card.’
- 1.1 A pair of people or things.
pair, couple, duo, twosome, duologyView synonyms
- ‘A quatraton is inferred either from the presence of two singletons, no doubletons, and no tripletons or from the presence of no singletons, one doubleton, and no tripletons.’
- ‘Initially, the differential sites are classified into singletons, doubletons, or tripletons for each of the six OTUs separately or for the various combinations of the OTUs, as described in Materials and Methods.’
- ‘We excluded singletons and doubletons and compared the following seven sites in order: M1046, M1312, M1414, M4325, A2144, A3203, and A3416.’
- ‘Of these, 75 are singletons, two are doubletons, and one is present in three sequences.’
- ‘Additionally, all singleton, doubleton, and tripleton sites (variants that appear, respectively, only once, twice, or three times in the total sample) were verified by reamplification and resequencing.’
- ‘The distribution of singletons, doubletons (low frequency variants), and other (high frequency) variants among the continents was investigated.’
- ‘The difference in sign of Tajima's D for each locus separately suggests a slight excess of singletons and doubletons in the North Carolina population, although this is not significant.’
Early 20th century: from double, on the pattern of singleton.
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