A distinction, particularity, or distinguishing feature.
A crisis or turning point; A situation that changes how the future will unfold.
A pattern or organizing principle that forms the basis of moral judgements.
A visible dividing line where two structures come together.
A related but distinct thing.
Deviation from the mean orbit of a heavenly body.
The act of varying; a partial change in the form, position, state, or qualities of a thing.
The angular difference at the vessel between the direction of true north and magnetic north.
A line of play that differs from the original.
The modification of a hereditary trait.
A technique where material is repeated with alterations to the melody, harmony, rhythm, timbre, texture, counterpoint or orchestration; but with some invariant characteristic, e.g. a ground bass.