A bladder, especially the urinary bladder or the gallbladder.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "vesica" in a sentence
"In Latin the mandorla is called the vesica piscis, or fish bladder, another oval shape."
"Of course, this device is properly called the vesica everter."
"The statues are arranged in five horizontal lines from north to south, exclusive of the figure in the "vesica," the oval above."