vesicles

[ves-i-kuhl]

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noun

a small sac or cyst.

Biology. a small bladderlike cavity, especially one filled with fluid.

Pathology. a circumscribed elevation of the epidermis containing serous fluid; blister.

Geology. a small, usually spherical cavity in a rock or mineral, formed by expansion of a gas or vapor before the enclosing body solidified.

Origin:
1570–80; < Latin vēsīcula little bladder. See vesica, -ule

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Vesicles is always a great word to know.

So is slumgullion. Does it mean:

a stew of meat, vegetables, potatoes, etc.

the offspring of a zebra and a donkey.

American Heritage

Science Dictionary

vesicle

(věs'ĭ-kəl) Pronunciation Key

A small fluid-filled sac in the body.
A membrane-bound sac in eukaryotic cells that stores or transports the products of metabolism in the cell and is sometimes the site for the breaking down of metabolic wastes. Vesicles bulge out and break off from the endoplasmic reticulum and the Golgi apparatus. Vesicles get their energy for mobility from ATP. Lysosomes and peroxisomes are vesicles.
A small cavity formed in volcanic rock by entrapment of a gas bubble during solidification.

vesicular adjective (vě-sĭk'yə-lər, və-)

ves·i·cle