What is characterized by polysynthesis; agglutinative. Polysynthetic twinning (Min.), repeated twinning, like that of the triclinic feldspar, producing fine parallel bands in alternately reversed positions called?

polysynthetic — Characterized by polysynthesis; agglutinative. Polysynthetic twinning (Min.), repeated twinning, like that of the triclinic feldspar, producing fine parallel bands in alternately reversed positions. (Webster's 1913.)

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