Lexic.us

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. Noun. (cytology) An organelle found in the cells of green plants, and in photosynthetic algae, where photosynthesis takes place. ¹

¹ Source: wiktionary.com

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

Literary usage of Chloroplast

Below you will find example usage of this term as found in modern and/or classical literature:

1. Research Methods in Ecology by Frederic Edward Clements (1905)
"Such cases merely serve to confirm the view that the perception of light stimuli is localized in the chloroplast. In conformity with this view, ..."

2. Report of the Annual Meeting (1906)
"As is well known, the chloroplast in the epistrophe position a flattened and lenticular form. The (¡brillar structure appear/to that they are connected ..."

3. Elementary Botany by George Francis Atkinson (1898)
"During carbon conversion the starch formed is deposited generally in small grains within the green chloroplast in the leaf. ..."

4. An Introduction to Vegetable Physiology by Joseph Reynolds Green (1900)
"If a chloroplast so treated is examined with a & ^ appearance of fig. 108, the little grains of l» high power of the microscope, it presents the (§? ..."

5. An Introduction to Vegetable Physiology by Joseph Reynolds Green (1907)
"... CHLO- in any way upon the colouring matter, the presence of the latter influencing only the other function of the chloroplast, the synthesis of sugar, ..."

6. Biotechnology of Algae: A Bibliography by Virginia Stone (1994)
"This methodology should allow the introduction of any desired change into the chloroplast genome, even in the absence of phenotypic selection, ..."

7. Lectures on Plant Physiology by Ludwig Jost (1907)
"run it is only a chloroplast enclosed in protoplasm that can assimilate, ... The dependence of the chloroplast on the protoplasm need not be directly ..."

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