Sentence:  Kircher's Musarithmetic Ark (“musurgia universalis") and the "<WSD>Enneachord</WSD> of Nature" attempted to explain the phenomenal world in magical-musical terms: each string defined relationships among minerals, stones, plants, trees, birds, colors, etc. 
Meaning of the word marked with <WSD> tags:  A mystical chord or combination of nine entities that characterizes the "music of the spheres".