What is of or pertaining to the middle of the ethmoid region or ethmoid bone. -- n. (Anat.) The median vertical plate, or median element, of the ethmoid bone called?

mesethmoid — Of or pertaining to the middle of the ethmoid region or ethmoid bone. -- n. (Anat.) The median vertical plate, or median element, of the ethmoid bone. (Webster's 1913.)

Sources