Definition of strong aorist in English:

strong aorist

noun

Ancient Greek Grammar
  • Conventional name for the thematic or second aorist (ἔλιπον), characterized by a thematic e/o vowel, in contrast with the sigmatic or weak aorist (ἔλειψα), formed with an -s(a) suffix.

Origin

Mid 19th century; earliest use found in Bibliotheca Sacra.