Definition of allophanic in English:

allophanic

adjective

Chemistry
  • Of or derived from this acid.

adjective

  • Of the nature of or containing the clay mineral allophane; especially designating soils dominated by allophane and related minerals, typically occurring on substrates of volcanic ash and weathered volcanic rocks.

Origin

Mid 19th century (in an earlier sense). From Byzantine Greek ἀλλοϕανής appearing otherwise (from ancient Greek ἀλλο- + -ϕανής) + -ic, originally (in allophanic acid) after German Allophansäure<br>early 20th century. From allophane + -ic.

Pronunciation

allophanic

/aləˈfanɪk/