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