thumb-sucking

noun

thumb-suck·​ing -ˌsək-iŋ How to pronounce thumb-sucking (audio)
: the habit especially of infants and young children of sucking a thumb

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Cite this Entry

“Thumb-sucking.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/thumb-sucking. Accessed 21 May. 2024.

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