plural psammomas also psammomata
-mət-ə 
: a hard fibrous tumor of the meninges of the brain and spinal cord containing calcareous matter
Cite this Entry
“Psammoma.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/psammoma. Accessed 7 May. 2025.
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