D defs.my
Entry 6 senses Webster, 1913

Vesicle

/vĕz'-ĭk-əl/ · Ves·i·cle · IPA /ˈvɛsɪkəl/
01 n. A bladderlike vessel; a membranous cavity; a cyst; a cell.
  1. 1.
    A bladderlike vessel; a membranous cavity; a cyst; a cell.
  2. 2.
    A small bladderlike body in the substance of a vegetable, or upon the surface of a leaf.(Bot.)
  3. 3.
    A small, and more or less circular, elevation of the cuticle, containing a clear watery fluid.(Med.)
  4. 4.
    A cavity or sac, especially one filled with fluid; as, the umbilical vesicle.(Anat.)
  5. 5.
    A small convex hollow prominence on the surface of a shell or a coral.(Zool.)
  6. 6.
    A small cavity, nearly spherical in form, and usually of the size of a pea or smaller, such as are common in some volcanic rocks. They are produced by the liberation of watery vapor in the molten mass.(Geol.)