dimidiation
/dɪˌmɪdɪˈeɪʃən/
noun 3
Definitions
noun
1
The act of dividing into halves.
2
The condition of being divided into halves.
3
A marshalling of two coats of arms by the bisection per pale of their escutcheons and forming a new coat of arms from the dexter half of one coat and the sinister half of the other.
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