1930s; earliest use found in Acta Medica Scandinavica. From porphyria + -ic.
porphyric2
/pɔːˈfɪrɪk/
ChieflyGeology
adjective
= porphyritic.
Origin
Early 19th century; earliest use found in John Hodgson (1779–1845), antiquary. From porphyry + -ic. Compare post-classical Latin porphyricus, French porphyrique, Italian porfirico.