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2 definitions found
 for Columnar structure
From The Collaborative International Dictionary of English v.0.48 :

  Columnar \Co*lum"nar\, a. [L. columnaris, fr. columna.]
     Formed in columns; having the form of a column or columns;
     like the shaft of a column.
     [1913 Webster]
  
     Columnar epithelium (Anat.), epithelium in which the cells
        are prismatic in form, and set upright on the surface they
        cover.
  
     Columnar structure (Geol.), a structure consisting of more
        or less regular columns, usually six-sided, but sometimes
        with eight or more sides. The columns are often fractured
        transversely, with a cup joint, showing a concave surface
        above. This structure is characteristic of certain igneous
        rocks, as basalt, and is due to contraction in cooling.
        [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Structure \Struc"ture\, n. [L. structura, from struere,
     structum, to arrange, build, construct; perhaps akin to E.
     strew: cf. F. structure. Cf. Construe, Destroy,
     Instrument, Obstruct.]
     1. The act of building; the practice of erecting buildings;
        construction. [R.]
        [1913 Webster]
  
              His son builds on, and never is content
              Till the last farthing is in structure spent. --J.
                                                    Dryden, Jr.
        [1913 Webster]
  
     2. Manner of building; form; make; construction.
        [1913 Webster]
  
              Want of insight into the structure and constitution
              of the terraqueous globe.             --Woodward.
        [1913 Webster]
  
     3. Arrangement of parts, of organs, or of constituent
        particles, in a substance or body; as, the structure of a
        rock or a mineral; the structure of a sentence.
        [1913 Webster]
  
              It [basalt] has often a prismatic structure. --Dana.
        [1913 Webster]
  
     4. (Biol.) Manner of organization; the arrangement of the
        different tissues or parts of animal and vegetable
        organisms; as, organic structure, or the structure of
        animals and plants; cellular structure.
        [1913 Webster]
  
     5. That which is built; a building; esp., a building of some
        size or magnificence; an edifice.
        [1913 Webster]
  
              There stands a structure of majestic frame. --Pope.
        [1913 Webster]
  
     Columnar structure. See under Columnar.
        [1913 Webster]

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