IPA: /ˌpɒlɪˈdʒɛnɪk/
KK: /pɑlɪˈdʒɛnɪk/
Relating to or influenced by multiple genes, often used in the context of traits or characteristics that are controlled by more than one gene.
Height is a polygenic trait, meaning it is influenced by several different genes.
Polygenic → It is formed from "poly-" (from Greek "polus", meaning many) and "genic" (from Greek "genes", meaning born of or produced by). The word "polygenic" refers to traits that are influenced by many genes.
Think of 'many' ('poly-') genes ('genic') working together to shape a trait.