中央凹 zhōng yāng āo

DEFINITIONS

  1. fovea centralis (depression in the macula retina, most sensitive optic region)

CHARACTERS

中 zhōng
HSK 1
central; center, middle; in the midst of; hit (target); attain
央 yāng
HSK 6
center, conclude, run out; beg
凹 āo
HSK 6
concave, hollow, depressed; a pass, valley