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hy·po·ge·al | \ ˌhī-pə-ˈjē-əl 
\
\variants:
or hypogean \ ˌhī-pə-ˈjē-ən \ or hypogeous \ ˌhī-pə-ˈjē-əs \
\ or hypogeous \ ˌhī-pə-ˈjē-əs \Definition of hypogeal
1 : growing or living below the surface of the ground
2 of a cotyledon : remaining below the ground while the epicotyl elongates
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Time Traveler for hypogeal
The first known use of hypogeal was in 1686
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