Divided into two equal halves or reduced to half its original size, often used in heraldry to describe a shield split vertically.
From Latin 'dimidiatus,' past participle of 'dimidiare,' meaning to halve. Derived from 'dimidius' (half) and 'medius' (middle), the term evolved in medieval heraldry to describe the specific way coats of arms could be combined.
In heraldry, when two families merged through marriage, their shields were sometimes 'dimidiated' by cutting them vertically and joining only the relevant halves—a visual shortcut that created some pretty confusing symbols for modern historians trying to figure out family trees!
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