urinesac
nounUK /ˈjʊərɪnsæk/
US /ˈjʊrɪnsæk/
A urinesac is a little bag inside some animals that holds their pee.
The baby frog's urinesac helps it store water.
OTHER MEANINGS
2. A sac-like organ in certain invertebrates that stores urine before release.
The earthworm's urinesac empties through tiny pores.
3. A protective fluid-filled pouch surrounding a developing embryo in some species.
The urinesac shielded the tiny embryo from drying out.
4. A medical term for an abnormal fluid collection resembling a bladder.
The scan showed a small urinesac near the kidney.