✨📕 The NEWThe NEW Collegiate Dictionary, 12th Edition Over 5,000 words added — Buy Now! Collegiate DictionaryBuy Now!

lubb-dupp

noun

variants also lub-dup or lub-dub
: the characteristic sounds of a normal heartbeat as heard in auscultation

Browse Nearby Words

Cite this Entry

“Lubb-dupp.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/lubb-dupp. Accessed 1 Dec. 2025.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!