From Longman Dictionary of Contemporary Englishsextupletsex‧tu‧plet /sekˈstjuːplɪt $ -ˈstʌ-/ noun [countable] HBHSSCone of six people who are born at the same time and have the same mother
Examples from the Corpus
sextuplet• While multiple births have increased in recent years because of the success of fertility drugs, sextuplets still are rare.• Only two other sets of sextuplets have been born in Britain and Jan has now appointed a media agent.• If this were an old-fashioned hexagon, our sextuplet would be joyfully paired off by the time the curtain fell.• The sextuplets are seven today and they've been celebrating with cakes, presents and party games.• The sextuplets were born after their Mum Sue had fertility treatment.• An Illinois woman reportedly gave birth to sextuplets, five of whom survived.Origin sextuplet (1800-1900) sextuple “six times” ((17-21 centuries)), from Late Latin sextuplex, from Latin sextus “sixth” 