What does prefix poly mean

Many.

Explanation:

The prefix means "many".

For example:

Poly-gon is "many sides" or to be exact, having at least 3 straight sides and angles.

Poly-hedron is "many faces", which is used to describe a side of a 3d shape.

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characterization of nanoparticles is a critical step in nanomaterial production as it provides information of dimension, morphology, surface charge, distribution and degree of surface functionalization.

c. the initial amount of money placed in the savings account