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sinus US English

A cavity within a bone or other tissue, especially one in the bones of the face or skull connecting with the nasal cavities

sinuses in sinus US English

A cavity within a bone or other tissue, especially one in the bones of the face or skull connecting with the nasal cavities

sinus venosus US English

The first chamber of the heart in fish, amphibians, and reptiles, emptying into the right atrium

coronary sinus US English

A wide venous channel about 2.25 centimeters in length that receives blood from the coronary veins and empties into the right atrium of the heart