Definition of poly- in English:

poly-

combining form

1Many; much: polyandry polychrome
1.1 Chemistry Denoting the presence of many atoms or groups of a particular kind in a molecule: polycarbonate

Origin

from Greek polus 'much', polloi 'many'.

Definition of poly- in:

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Word of the day anomalous
Pronunciation: əˈnämələs
adjective
deviating from what is standard, normal, or expected