guilloche, n. [F. guillochis; -- said to be fr. Guillot, the inventor of a machine for carving it.].
An ornament in the form of two or more bands or strings twisted over each other in a continued series, leaving circular openings which are filled with round ornaments. [1913 Webster]
In ornamental art, any pattern made by interlacing curved lines. [Webster 1913 Suppl.]