Dimidiation

Dimidiation
This article is about heraldry. For the mathematical operation, see division by two.
Coat of arms of Hastings, showing a partially dimidiated shield, where the front halves of the upper and lower lions are joined to the rear halves of ships. This motif features widely in the heraldry of the Cinque Ports
Horizontally dimidiated rabbit and fish, arms of the town and gmina of Prochowice, SW Poland. Horizontal dimidiations are rare, if not unknown, in English heraldry

In heraldry, dimidiation is a method of joining 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.

  • Example of two coats dimidiated

  • The same two coats impaled

  • When the dexter half of a bend sinister is dimidiated with the sinister half of a bend, the result would look like a chevron

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Look at other dictionaries:

  • Dimidiation — Di*mid i*a tion, n. [L. dimidiatio.] The act of dimidiating or halving; the state of being dimidiate. [1913 Webster] …   The Collaborative International Dictionary of English

  • dimidiation — index split Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • dimidiation — ˌmidēˈāshən noun ( s) Etymology: Late Latin dimidiation , dimidiatio action of halving, from Latin dimidiatus + ion , io ion : a formation of marshaling by joining the dexter half of one heraldic shield with the sinister half of another divided… …   Useful english dictionary

  • dimidiation — noun a) The act of dividing into halves b) The formation of a coat of arms from the halves of two others See Also: dimidiate …   Wiktionary

  • dimidiation — di·mid·i·a·tion …   English syllables

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  • Division by two — In mathematics, division by two or halving has also been called mediation or dimidiation.[1] The treatment of this as a different operation from multiplication and division by other numbers goes back to the ancient Egyptians, whose multiplication …   Wikipedia

  • Cinque Ports — For the galleon, see Cinque Ports (1703 ship). Location of the Cinque Ports and their limbs. The Confederation of Cinque Ports (pronounced sink ports, never as the French cinq) is a historic series of coastal towns in Kent and Sussex. It was… …   Wikipedia

  • bisection — (Roget s Thesaurus) >Division into two parts. < N PARAG:bisection >N GRP: N 1 Sgm: N 1 bisection bisection bipartition Sgm: N 1 dichotomy dichotomy subdichotomy Sgm: N 1 halving halving &c. >V. Sgm: N 1 dimidiation dimidiation …   English dictionary for students

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