thumb-sucking

noun
thumb-suck·​ing | \ -ˌsək-iŋ How to pronounce thumb-sucking (audio) \

Medical Definition of thumb-sucking

: 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 12 Aug. 2020.

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