plural quadruplets
: one of four babies that are born at the same time to the same mother
—usually plural
She had (a set of) quadruplets. [=she gave birth to four babies]
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“Quadruplet.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/quadruplet. Accessed 8 Apr. 2026.
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