quintuplet

UK: /ˈkwɪntjʊplɪt/, /kwɪnˈtjuːplɪt/

US: /kwɪnˈtʌplɪt, -ˈtuplɪt, -ˈtju-/

US: (kwin tup′lit, -to̅o̅′plit, -tyo̅o̅′-, kwin′tŏŏ plit, -tyŏŏ-)

WordReference Random House Learner's Dictionary of American English © 2025

quin•tu•plet /kwɪnˈtʌplɪt, -ˈtuplɪt, -ˈtyu-/   n. 

[countable]
1. a group of five of a kind.
2. one of five children or offspring born of the same mother at the same time.

See -plic-.

WordReference Random House Unabridged Dictionary of American English © 2025

quin•tu•plet  (kwin tup′lit, -to̅o̅′plit, -tyo̅o̅′-, kwin′tŏŏ plit, -tyŏŏ-), n. 

1. any group or combination of five, esp. of the same kind.
2. Medicine quintuplets, five children or offspring born of one pregnancy.
3. one of five such children or offspring.
4. Music and Dance a group of five notes of equal value performed in the time normally taken for four.

• quintuple + -et 1870–75

Collins Concise English Dictionary © HarperCollins Publishers::

quintuplet / ˈkwɪntjʊplɪt kwɪnˈtjuːplɪt/ noun

1. a group or set of five similar things
2. one of five offspring born at one birth
3. a group of five notes to be played in a time value of three, four, or some other value