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psi (1)
psi (2)
psi particle
psia
psid
psig
psilocin
psilocybin
psilomelane
psilophyte
psilopsid
psittacine
psittacosaurus
psittacosis
PSL
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psilomelane
psi·lom·e·lane [ sī lómmə làyn ]


noun 
Definition:
 
manganese ore: a mixed hydrated manganese oxide mineral occurring in dark-colored rounded masses
[Mid-19th century. < Greek psilos "smooth" + melas "black"]
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