Definition of protyle in US English:

protyle

(also prothyl)

noun

historical
  • A hypothetical original undifferentiated matter from which the chemical elements were supposed to derive.

Origin

Late 19th century; earliest use found in William Crookes (1832–1919), chemist and science journalist. Irregularly from proto- + ancient Greek ὕλη timber, material, (in philosophical language) matter; compare πρώτη ὕλη first matter or substance (Aristotle Metaphysics).

Pronunciation

protyle

/ˈprəʊtʌɪl/