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Webster 1913 Edition

Noun.

(Arch.)

An ornament resembling a ball placed in a circular flower, the petals of which form a cup round it, – usually inserted in a hollow molding.

See also: ballflower and ball flower

ball-flower ‎(plural ball-flowers)

(architecture) An ornament resembling a ball placed in a circular flower, whose petals form a cup around it; usually inserted in a hollow moulding.