Hypogeal, hypogean, hypogeic and hypogeous are biological terms describing an organism`s activity below the soil surface. In botany, a seed is described as showing hypogeal germination when the cotyledons of the germinating seed remain non-photosynthetic, inside the seed shell, and below ground. The converse, where the cotyledons expand, throw of.... Found on http://en.wikipedia.org/wiki/Hypogeal
<plant biology> Of germination, having the cotyledon remaining within the seed coat. ... Compare: epigeal. ... (09 Oct 1997) ... Found on http://www.encyclo.co.uk/local/20973
Describing seed germination in which the cotyledons remain below ground. It can refer to fruits that develop underground, such as peanuts Arachis hypogea Found on https://www.encyclo.co.uk/local/21221