Definition of porphyrize in English:

porphyrize

(also porphyrise)

verb

rare
  • with object To grind to a fine powder, especially on a slab of porphyry.

Origin

Mid 18th century. From porphyry + -ize, probably after French porphyriser.

Pronunciation

porphyrize

/ˈpɔːfɪrʌɪz/