motif

noun

1. A recurring or dominant element; an artistic theme.
2. A short melodic or lyrical passage that is repeated in several parts of a work.
3. A decorative figure that is repeated in a design or pattern.
4. A decorative appliqué design or figure, as of lace or velvet, used in trimming.
5. The physical object or objects repeated at each point of a lattice. Usually atoms or molecules.
6. A basic element of a move in terms of why the piece moves and how it supports the fulfilment of a stipulation.
7. In a nucleotide or aminoacid sequence, pattern that is widespread and has, or is conjectured to have, a biological significance.