这个词是什么意思？
A phylum of unicellular flagellates of ancient eukaryotic lineage with unclear taxonomy. They lack a CELL WALL but are covered by a proteinaceous flexible coat, the pellicle, that allows the cell to change shape. Historically some authorities considered them to be an order of protozoa and others classed them as ALGAE (some members have CHLOROPLASTS and some don't).
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D016822 · MeSH 2026。
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