Hypogeal

Hypogeal

Hypogeal means "underground".
* In botany, a seed is described as hypogeal when the cotyledons of the germinating seed remain non-photosynthetic, inside the seed shell, and below ground. The converse, where the cotyledons expand, throw off the seed shell and become photosynthetic above the ground, is epigeal.
* In water purification works, the hypogeal (or Schmutzdecke) layer is a biological film just below the surface of slow sand filters. It contains microorganisms that remove bacteria and trap contaminant particles.


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  • hypogeal — [hī΄pō jē′əl, hip΄ōjē′əl] adj. [< LL hypogeus, underground (< Gr hypogaios < hypo , under + gē, earth) + AL] 1. of, or occurring in, the region below the surface of the earth 2. a) Bot. growing or maturing underground, as peanuts or… …   English World dictionary

  • hypogeal — or hypogean or hypogeous adjective Etymology: Late Latin hypogeus subterranean, from Greek hypogaios, from hypo + gaia earth Date: 1686 1. growing or living below the surface of the ground 2. of a cotyledon remaining below the ground while the… …   New Collegiate Dictionary

  • hypogeal — /huy peuh jee euhl, hip euh /, adj. underground; subterranean. Also, hypogaeal, hypogeous, hypogaeous. [1680 90; < L hypoge(us) ( < Gk hypógeios underground, subterranean, equiv. to hypo HYPO + gê earth + ios adj. suffix) + AL1] * * * …   Universalium

  • hypogeal — adjective Existing or growing underground …   Wiktionary

  • hypogeal — (Roget s Thesaurus II) adjective Located or operating beneath the earth s surface: hypogean, hypogeous, subterranean, subterrestrial, underground. See SURFACE …   English dictionary for students

  • hypogeal — [ˌhʌɪpə(ʊ) dʒi:əl] (also hypogean) adjective Botany remaining or occurring underground. Compare with epigeal. Origin C17: via late L. from Gk hupogeios (from hupo under + gē earth ) + al …   English new terms dictionary

  • hypogeal — hy·po·ge·al …   English syllables

  • hypogeal — hy•po•ge•al [[t]ˌhaɪ pəˈdʒi əl[/t]] also hy po•ge′an, hy po•ge′ous adj. existing or growing underground • Etymology: 1680–90; < L hypogē(us) (< Gk hypógeios underground =hypo hypo + geios, adj. der. of gê earth) …   From formal English to slang

  • hypogeal — /haɪpəˈdʒiəl/ (say huypuh jeeuhl) adjective underground; subterranean. {Latin hypogēus (from Greek hypogeios underground) + al1} …  

  • hypogeal —   a. subterranean.    ♦ hypogean, a. growing underground.    ♦ hypogeic, a.    ♦ hypogeiody,   n. surveying underground …   Dictionary of difficult words

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