Term: frontal sinus: one of a pair of cavities in the frontal bone
Broader: sinus: any of various air-filled cavities especially in the bones of the skull | Unrelated: pyrogallol: a toxic white lustrous crystalline phenol used to treat certain skin diseases and as a photographic developer
Broader: sinus: any of various air-filled cavities especially in the bones of the skull | Unrelated: filariidae: threadlike roundworms
Broader: sinus: any of various air-filled cavities especially in the bones of the skull | Unrelated: nosher: someone who eats lightly or eats snacks between meals
Broader: sinus: any of various air-filled cavities especially in the bones of the skull | Unrelated: basic point defense missile system: a shipboard missile system
Broader: sinus: any of various air-filled cavities especially in the bones of the skull | Unrelated: balanus: type genus of the family Balanidae
Broader: sinus: any of various air-filled cavities especially in the bones of the skull | Unrelated: lactobacillus: a Gram-positive rod-shaped bacterium that produces lactic acid (especially in milk)
Broader: sinus: any of various air-filled cavities especially in the bones of the skull | Unrelated: capillarity: a phenomenon associated with surface tension and resulting in the elevation or depression of liquids in capillaries
Broader: sinus: any of various air-filled cavities especially in the bones of the skull | Unrelated: contribution: an amount of money contributed
Broader: sinus: any of various air-filled cavities especially in the bones of the skull | Unrelated: toad-in-the-hole: sausage baked in batter
Broader: sinus: any of various air-filled cavities especially in the bones of the skull | Unrelated: pest: a persistently annoying person