Definitions for "Sinuses"
Keywords:  mucus, mucous, skull, nasal, cavities
Four pairs of air pockets lined with membranes in the bones around the nose.
small cavities in the skull behind the eyes and nose. this is where most vocal resonance occurs.
Air filled cavities around the nose which produce mucous for nasal filtering. The sinuses drain into the nose through small openings or ostia.
Keywords:  lobe, maples, leaf, oaks, scroll
Leaf sinuses are the area between lobes. Maples and oaks are typical examples of trees with "lobes" and "sinuses". [To return to previous page, click your browser's BACK button then scroll through the page to your last location
The opposite of a lobe, the sinus is the part of a leaf that dips toward the center.