vesicle(redirected from primary brain vesicles)
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Related to primary brain vesicles: secondary brain vesicles
A small enclosed structure or cavity, especially:
a. Cytology A membrane-bound structure within a cell in which materials such as enzymes are transported or stored.
b. Anatomy A sac or cyst, especially one containing fluid.
c. Medicine A blister of the skin.
d. Geology A cavity formed in volcanic rock by entrapment of a gas bubble during solidification.
[Middle English, from Old French vesicule, from Latin vēsīcula, diminutive of vēsīca, bladder, blister.]
1. (Pathology) pathol
a. any small sac or cavity, esp one containing serous fluid
b. a blister
2. (Geological Science) geology a rounded cavity within a rock formed during solidification by expansion of the gases present in the magma
3. (Botany) botany a small bladder-like cavity occurring in certain seaweeds and aquatic plants
4. any small cavity or cell
[C16: from Latin vēsīcula, diminutive of vesica]
ves•i•cle(ˈvɛs ɪ kəl)
a. a small sac, cyst, or cavity, esp. one filled with fluid.
2. a small, spherical cavity in a rock or mineral, formed by expansion of a gas before the enclosing body solidified.
A small fluid-filled sac in the body.
A small sac or bladder that contains liquid.
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|Noun||1.||vesicle - a small anatomically normal sac or bladderlike structure (especially one containing fluid)|
dacryocyst, lacrimal sac, tear sac - either of the two dilated ends of the lacrimal ducts at the nasal ends of the eyes that fill with tears secreted by the lacrimal glands
dictyosome, Golgi apparatus, Golgi body, Golgi complex - a netlike structure in the cytoplasm of animal cells (especially in those cells that produce secretions)
sac - a structure resembling a bag in an animal
follicle - any small spherical group of cells containing a cavity
liposome - an artificially made microscopic vesicle into which nucleic acids can be packaged; used in molecular biology as a transducing vector