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chloroplast 音標拼音: [kl'ɔrəpl,æst] n. 葉綠體 葉綠體 chloroplast n 1: plastid containing chlorophyll and other pigments; in plants that carry out photosynthesis Chloroplast \Chlo"ro*plast\, n. [Pref. chloro- Gr. ? to mold, form.] (Biol.) A plastid containing chlorophyll, developed only in cells exposed to the light. Chloroplasts are minute flattened granules, usually occurring in great numbers in the cytoplasm near the cell wall, and consist of a colorless ground substance saturated with chlorophyll pigments. Under light of varying intensity they exhibit phototactic movements. In animals chloroplasts occur only in certain low forms. [Webster 1913 Suppl.]
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