As adjectives the difference between piriform and pisiform
is that piriform is alternative form of lang=en while pisiform is resembling a pea or peas in size and shape.
As a noun pisiform is
a small bone in the wrist at the junction of the ulna and the carpus.
pisiform
English
Adjective
(
en adjective)
Resembling a pea or peas in size and shape
- a pisiform iron ore
Noun
(
en noun)
A small bone in the wrist at the junction of the ulna and the carpus
Synonyms
* pisiform bone