frontal sinus

noun

: either of two air spaces lined with mucous membrane each of which lies within the frontal bone above one of the orbits

Dictionary Entries Near frontal sinus

frontal process

frontal sinus

frontal vein

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Cite this Entry

“Frontal sinus.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/frontal%20sinus. Accessed 26 Apr. 2024.

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