This word is acceptable for play in the UK dictionary that is being used in the following games:

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n. The act of dividing into halves

n. The formation of a coat of arms from the halves of two others

n. The act of dimidiating or halving; the state of being dimidiate.

n. The act of halving; division into two equal parts; the state of being halved.

"This dimidiation in the Gallican method of singing the Responsory led to some confusion of the sense of what was being sung, and Blessed Cardinal Tommasi, quoting from Amalarius, says that in consequence it became necessary to introduce some different verses in Gaul, so that there might be but one sense running through the words of both Respond and verse."

dimidiation formula   

dimidiate