: cistern sense 3: such as
a
: one of the large spaces under the arachnoid membrane
b
: one of the flattened vesicles comprising the Golgi apparatus and the part of the endoplasmic reticulum studded with ribosomes

Word History

Etymology

New Latin, from Latin, reservoir

First Known Use

circa 1860, in the meaning defined above

Time Traveler
The first known use of cisterna was circa 1860

Browse Nearby Words

Cite this Entry

“Cisterna.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cisterna. Accessed 26 Mar. 2025.

Medical Definition

cisterna

noun
: cistern: as
c
: one of the interconnected flattened vesicles or tubules comprising the endoplasmic reticulum
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