sacculus

[ sak-yuh-luh s ]
/ ˈsæk yə ləs /

noun, plural sac·cu·li [sak-yuh-lahy] /ˈsæk yəˌlaɪ/.

a saccule.

Origin of sacculus

1615–25; < Latin, equivalent to sacc(us) sack1 + -ulus -ule