Atrium definition

Atrium





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2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Atrium \A"tri*um\, n.; pl. {Atria}. [L., the fore court of a
     Roman house.]
     1. (Arch.)
        (a) A square hall lighted from above, into which rooms
            open at one or more levels.
        (b) An open court with a porch or gallery around three or


            more sides; especially at the entrance of a basilica
            or other church. The name was extended in the Middle
            Ages to the open churchyard or cemetery.
            [1913 Webster]
  
     2. (Anat.) The main part of either auricle of the heart as
        distinct from the auricular appendix. Also, the whole
        articular portion of the heart.
        [1913 Webster]
  
     3. (Zool.) A cavity in ascidians into which the intestine and
        generative ducts open, and which also receives the water
        from the gills. See {Ascidioidea}.
        [1913 Webster]
  
     4. (Anat.) A cavity, entrance, or passage; as, the atrium, or
        atrial cavity, in the body wall of the amphioxus; an
        atrium of the infundibula of the lungs, etc.
        [Webster 1913 Suppl.]

From WordNet (r) 2.0 [wn]:

  atrium
       n 1: any chamber that is connected to other chambers or
            passageways (especially one of the two upper chambers of
            the heart)
       2: the central area in a building; open to the sky
       [also: {atria} (pl)]

















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