Eyelids,Third
《英文msh詞典》Eyelids,Third
[入口詞] Eyelids,Third
[主題詞] Nictitating Membrane
[英文釋義] A fold of the mucous membrane of the CONJUNCTIVA in many animals. At rest,it is hidden in the medial canthus. It can extend to cover part or all of the cornea to help clean the CORNEA.