Definition of frontal sinus Frontal sinus
We found 2 definitions of frontal sinus from 2 different sources.
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What does frontal sinus mean?
WordNet
Noun |
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| frontal sinus - one of a pair of cavities in the frontal bone |
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Wiktionary 
- frontal sinus (Noun)
A paranasal sinus situated behind the superciliary arches.
