pian1
/pɪˈan/noun
The disease yaws.
Origin
Early 17th century; earliest use found in Samuel Purchas. From French pian from Tupi pi'ã. Compare Guarani pia ‘bubas, granos’.
Pian2
/ˈpʌɪən/adjective
Of or relating to any of the Popes named Pius; specifically of or relating to the pontificate or liturgical reforms of Pope Pius V (1566–72) or the pontificate of Pope Pius X (1903–14).
Origin
Early 20th century; earliest use found in The Month: an illustrated magazine of literature, science and art. From Pius, use as male forename of classical Latin pius pious, dutiful + -an, originally after the name of Pope Pius V, who introduced a new breviary in 1568, subsequently also after the name of Pius X.