: a bone on the ulnar side of the carpus in most mammals
Examples of pisiform in a Sentence
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Jeff Fletcher, Oc Register, 26 Apr. 2026
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Noun
The Angels catcher fractured his pisiform bone when a foul ball in Saturday’s game struck the tiny bone near his wrist on the pinky side of his left hand.
—Jeff Fletcher, Oc Register, 26 Apr. 2026
Cite this Entry
“Pisiform.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pisiform. Accessed 10 May. 2026.
Copy CitationMedical Definition
pisiform
1 of 2 adjective
pi·si·form
ˈpī-sə-ˌfȯrm 
: resembling a pea in size or shape
pisiform granules
pisiform
2 of 2 noun
variants
or pisiform bone
: a bone on the little-finger side of the carpus that articulates with the triquetral bone
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