Definition of hypogeum in English:
 hypogeum
nounPlural hypogea ˌhʌɪpə(ʊ)ˈdʒiːəmˌhaɪpəˈdʒiəm
An underground chamber.
 Example sentencesExamples
-  It's a Etruscan hypogeum grave, built in the II century B.C. for the family of Arunte Volumnio.
 -  Without a doubt, its great attraction continues to be the existence of groups of enormous hypogea carved in the hardened volcanic ash.
 -  On the island of Malta, where great colossal statues of Goddesses still stand, is the underground hypogeum.
 -  Today the hypogeum is in remarkable condition, and an air conditioning system has recently been installed to help preserve the site.
 -  The problem of conservation, restoration and exploitation of Roman hypogea is part of the more general need to safeguard of the Cultural Heritage of Europe.
 -  Consequently the absence of an Agapè table from the Christian hypogeum may in future help in dating hypogea.
 -  This stingless bee, Trigona hypogea, carries off the youngsters left behind in newly abandoned wasp nests.
 -  These hypogea range from single tombs to larger clusters found within the same ridge similar to what one may observe at the site of Ta’ Bistra in Mosta.
 -  One of the most fascinating parts of this farm is the huge hypogeum olive-press, named after it.
 -  What conditions limiting growth of cyanobacteria can be safety applied in Roman hypogea?
 
Origin
  
Mid 17th century: from Latin, from Greek hupogeion, neuter of hupogeios 'underground'.
   Definition of hypogeum in US English:
 hypogeum
nounˌhīpəˈjēəmˌhaɪpəˈdʒiəm
An underground chamber.
 Example sentencesExamples
-  What conditions limiting growth of cyanobacteria can be safety applied in Roman hypogea?
 -  These hypogea range from single tombs to larger clusters found within the same ridge similar to what one may observe at the site of Ta’ Bistra in Mosta.
 -  On the island of Malta, where great colossal statues of Goddesses still stand, is the underground hypogeum.
 -  One of the most fascinating parts of this farm is the huge hypogeum olive-press, named after it.
 -  It's a Etruscan hypogeum grave, built in the II century B.C. for the family of Arunte Volumnio.
 -  Consequently the absence of an Agapè table from the Christian hypogeum may in future help in dating hypogea.
 -  Without a doubt, its great attraction continues to be the existence of groups of enormous hypogea carved in the hardened volcanic ash.
 -  The problem of conservation, restoration and exploitation of Roman hypogea is part of the more general need to safeguard of the Cultural Heritage of Europe.
 -  Today the hypogeum is in remarkable condition, and an air conditioning system has recently been installed to help preserve the site.
 -  This stingless bee, Trigona hypogea, carries off the youngsters left behind in newly abandoned wasp nests.
 
Origin
  
Mid 17th century: from Latin, from Greek hupogeion, neuter of hupogeios ‘underground’.