Definition of palaeo- in English:

palaeo-

(US paleo-)

combining form

  • Older or ancient, especially relating to the geological past.

    ‘Palaeolithic’
    ‘palaeomagnetism’

Origin

From Greek palaios ancient.

Pronunciation:

palaeo-

/ˈpeɪlɪəʊ//ˈpalɪəʊ/