You can overdose on coffee if you drink about 30 cups in a brief period to get close to a lethal dosage of caffeine.
CHLOROPLAST
chloroplast
(noun) plastid containing chlorophyll and other pigments; in plants that carry out photosynthesis
Source: WordNet® 3.1
Etymology
Noun
chloroplast (plural chloroplasts)
(cytology) An organelle found in the cells of green plants, and in photosynthetic algae, where photosynthesis takes place.
Source: Wiktionary
Chlo"ro*plast, n. [Pref. chloro-+ Gr. to mold, form.] (Biol.)
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition
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