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Definition: Zygophyllaceous algae, characterized by a single cell with two primary structures: a cell wall composed primarily of cellulose and xylan, and a small vacuole containing water-soluble pigments.
Definition: In botany, a zygophyll is a type of flowering plant that produces flowers in both male and female reproductive structures. This means that the flowers have two different types of pollen from which to produce seeds. The name "zygophyll" comes from the Greek word "zygote," meaning "seed."