A thin outer layer.
A telling-off; a reprimand.
A membrane-bound compartment found in a cell.
A small sac or cyst or vacuole, especially one containing fluid. A blister formed in or beneath the skin, containing serum. A bleb.
(usually and especially) Such a blister that is less than 5 mm in diameter.
A small cavity formed in volcanic rock by entrapment of a gas bubble during solidification.
A small sac filled with juice, one of many constituting the pulp of a fruit such as an orange, lemon, or grapefruit.
A pocket of embryonic tissue that is the beginning of an organ.