Definition of paleo- in English:

paleo-

Syllabification: paleo-
(British palaeo-)

combining form

Older or ancient, especially relating to the geological past: Paleolithic paleomagnetism

Origin

from Greek palaios 'ancient'.

Definition of paleo- in:

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Word of the day envenom
Pronunciation: ɪnˈvɛnəm
verb
put poison on or into; make poisonous