hypogeal (hahy-puh-JEE-uhl, hip-uh-JEE-uhl) - adj., occurring, pertaining to, or living under the surface of the ground.
Subsurface. Contrast epigeal, above ground. Its main contexts seem to be botany (where whether a seed germinates hypogeal or epigeal is relevant) and certain branches of engineering. Borrowed in 1686 from Latin hypogeus, subterranean, from Greek hypogaios, from hypo-, under + gaia, earth + adjectival suffix.
---L.
Subsurface. Contrast epigeal, above ground. Its main contexts seem to be botany (where whether a seed germinates hypogeal or epigeal is relevant) and certain branches of engineering. Borrowed in 1686 from Latin hypogeus, subterranean, from Greek hypogaios, from hypo-, under + gaia, earth + adjectival suffix.
---L.