Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
eolithic is a noun and adjective meaning "the earliest part of the Stone Age marked by the earliest signs of human culture". It carries 2 recorded senses.
the earliest part of the Stone Age marked by the earliest signs of human culture
of or relating to the earliest period of the Stone Age (characterized by the use of eoliths)
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for eolithic come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.