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We found 18 dictionaries with English definitions that include the word frontal sinus: Click on the first link on a line below to go directly to a page where "frontal sinus" is defined. General (12 matching dictionaries) frontal sinus: Vocabulary.com [home, info] Frontal sinus, Frontal sinus: InfoVisual Visual Dictionary [home, info] frontal sinus: Wiktionary [home, info] frontal sinus: Dictionary.com [home, info] frontal sinus: UltraLingua English Dictionary [home, info] Frontal sinus: Wikipedia, the Free Encyclopedia [home, info] frontal sinus: Rhymezone [home, info] frontal sinus: Free Dictionary [home, info] frontal sinus: Mnemonic Dictionary [home, info] frontal sinus: WordNet 1.7 Vocabulary Helper [home, info] frontal sinus: LookWAYup Translating Dictionary/Thesaurus [home, info] frontal sinus: Dictionary/thesaurus [home, info] Computing (1 matching dictionary) frontal sinus: Encyclopedia [home, info] Medicine (5 matching dictionaries) Frontal Sinus: Medical Dictionary [home, info] Frontal sinus: Merck Manuals [home, info] frontal sinus: online medical dictionary [home, info] frontal sinus: Dictionary of Cancer Terms [home, info] frontal sinus: Medical dictionary [home, info]

Quick definitions from WordNet (frontal sinus) ▸ noun:  one of a pair of cavities in the frontal bone