| umls-concept:C0015028 | skos:definition | MSH: The numerous (6-12) small thin-walled spaces or air cells in the ETHMOID BONE located between the eyes. These air cells form an ethmoidal labyrinth.,NCI: A sinus of the meatuses of the nasal cavity. (NCI),NCI: A type of paranasal sinus (a hollow space in the bones around the nose). Ethmoid sinuses are found in the spongy ethmoid bone in the upper part of the nose between the eyes. They are lined with cells that make mucus to keep the nose from drying out.,NCI: A sinus of the meatuses of the nasal cavity. | lld:umls |
