IPA: /ˈɛpɪˌdʒiːəl/
KK: /ˈɛpɪˌdʒiəl/
Relating to plants that grow or develop above the ground, especially when the seed leaves appear above the soil after germination.
The epigeal growth of the plant allowed it to quickly reach sunlight after sprouting.
Epigeal is formed from "epi-" (meaning upon or above) and "geal" (from Greek "ge", meaning earth). The word describes something that grows or exists on the surface of the earth.
Think of something that is 'upon' ('epi-') the 'earth' ('ge') — that's why epigeal refers to things that grow on the surface of the earth.