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Definition of Chloroplast
1. Noun. Plastid containing chlorophyll and other pigments; in plants that carry out photosynthesis.
Definition of Chloroplast
1. n. 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.
Definition of Chloroplast
1. [n -S]
Medical Definition of Chloroplast
1. Photosynthetic organelle of higher plants. Lens shaped and rather variable in size but approximately 5m long. Surrounded by a double membrane and contains circular DNA though not enough to code for all proteins in the chloroplast). Like the mitochondrion, it is semi autonomous. It resembles a cyanobacterium from which, on the endosymbiont hypothesis, it might be derived. The photosynthetic pigment, chlorophyll, is associated with the membrane of vesicles (thylakoids) that are stacked to form grana. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)
Lexicographical Neighbors of Chloroplast
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