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In heraldry, dimidiation is a method of marshalling (heraldically combining) two coats of arms. For a time, dimidiation preceded the method known as impalement. Whereas impalement involves placing the whole of both coats of arms side by side in the same shield, dimidiation involves placing the dexter half of one coat of arms alongside the sinister half of the other. In the case of marriage, the dexter half of the husband's arms would be placed alongside the sinister half of the wife's arms. The practice fell out of use because the result was not always aesthetically pleasing (sometimes creating strange hybrids, as seen in the examples at right), and also because in some cases, it would result in a shield that confusingly looked like one coat of arms rather than a combination of two. For instance, a bend combined with a bend sinister might result in a combination that simply looked like a chevron, thus hiding the fact that two coats of arms had been combined. In order to avoid these drawbacks, it became customary to use more than half of each coat of arms when combining them through dimidiation. Once this practice had begun, the logical progression was to include the whole of both coats of arms in the new shield, so that in effect, impalement replaced dimidiation as a method of combining coats of arms. One rule which carries over from dimidiation to impalement is that if a coat of arms with a bordure is impaled, the bordure does not continue down the line of impalement, but is cut short. File:Dimidiation demo.svg|Example of two coats dimidiated File:Impalement demo.svg|The same two coats impaled File:Dimidiation, worse case demo.svg|When the ''dexter'' half of a ''bend sinister'' is dimidiated with the ''sinister'' half of a ''bend'', the result would look like a ''chevron'' ==See also== *Division of the field *Frisian eagle 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「dimidiation」の詳細全文を読む スポンサード リンク
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