Definition of dimidiate in English:

dimidiate

verb

[WITH OBJECT]Heraldry
  • 1 (of a coat of arms or charge) adjoin (another) so that only half of each is visible.

    • ‘In the base is a kneeling canon between two shields, one bearing the arms of Basset of Weldon dimidiating those of Ridel, the other bearing the arms of Basset of Weldon alone.’
    • ‘The crest has an oak tree dimidiated with a wheatsheaf, bound together by a blue and white wave.’
    • ‘In the upper part of the Shield a lion passant guardant dimidiates the hulk of a medieval ship.’
    • ‘The pomegranate dimidiated with a rose, meaning that the two half charges are joined, was one of the badges of Queen Mary of England, who ruled from 1553-1558.’
    • ‘These were, in the Portuguese version, per pale argent and vert, two roses dimidiating as many fleurs-de-lis, in dexter canton a dove volant argent.’
    1. 1.1(of a charge) having only one half depicted.
      • ‘The canton is the arms of the Cinque Ports: per pale gules and azure three lions passant guardant dimidiated and conjoined to the hulks of as many ancient ships all in pale or.’
      • ‘The bordures themselves were often dimidiated or even quartered and various lines of partition were used, so that the inside of the bordure might be engrailed or wavy.’
      • ‘The arms of Connacht - a dimidiated (divided in half from top to bottom) eagle and armed hand - are recorded as such on a map of Galway dated 1651, now in the library of Trinity College, Dublin.’
      • ‘Francoise's arms in Louis's Book of Hours (Fig.17 in body of article) are also dimidiated.’

Origin

Late 16th century: from Latin dimidiat- halved from the verb dimidiare, from dimidium half.

Pronunciation:

dimidiate

/dəˈmidēˌāt/