球囊; 球状囊
Sacculus \Sac"cu*lus\, n.; pl. {Sacculi}. [L., little sack.] (Anat.) A little sac; esp., a part of the membranous labyrinth of the ear. See the Note under {Ear}.
sacculus n : a small sac or pouch (especially the smaller chamber of the membranous labyrinth) [syn: {saccule}]