(idiomatic) A situation that cannot be recovered or reversed to its original state.

Pectinaria australis - an annelid beach worm that forms a fragile tapered tube, about 50 mm long made of grains of sand.

(medicine) A disorder in which pressure abnormalities in the middle ear result in symptoms.

plural of ignition tube test

plural of sand tube worm

plural of Fallopian tube

plural of vacuum tube

plural of hot tube

plural of Eustachian tube

plural of uterine tube