plastid

Definitions

  • WordNet 3.6
    • n plastid any of various small particles in the cytoplasm of the cells of plants and some animals containing pigments or starch or oil or protein
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Webster's Revised Unabridged Dictionary
    • Plastid (Biol) A formative particle of albuminous matter; a monad; a cytode. See the Note under Morphon.
    • Plastid (Bot) any of several types of minute granules found in the protoplasm of vegetable cells, having their own membrane, robosomes, and DNA. Among plant cells the most common are chloroplasts, which contain the chlorophyll and the photosynthetic machinery of the cell. They are divided by their colors into three classes, chloroplastids, chromoplastids, and leucoplastids.
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Century Dictionary and Cyclopedia
    • n plastid A unicellular organism; a simple unit of aggregation of the first order, as an individual protozoan, or a cell considered with reference to its developmental or evolutionary potentiality. The word has no exact zoölogical signification. Haeckel used it for any elementary organism, as a cell or cytode.
    • n plastid In botany, one of the variously shaped proteid bodies, such as chlorophyl-granules, leucoplastids, chromoplastids, etc., which may be clearly differentiated in the protoplasm of active cells.
    • n plastid They have substantially the same chemical and, with the exception of color, the same physical properties as protoplasm. They are regarded as being the centers of chemical activity in cells.
    • plastid Having the character or quality of a plastid; plastic or plasmic.
    • n plastid A general name for any permanent organ of the cell except the nucleus and centrosome.
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Etymology

Webster's Revised Unabridged Dictionary
Gr. , , a creator

Usage

In literature:

We may accordingly distinguish the following four grades or species of plastids, namely: 1.
"The History of Creation, Vol. I (of 2)" by Ernst Haeckel
Very many Protista remain for life simple plastids or individuals of the first order.
"The History of Creation, Vol. II (of 2)" by Ernst Haeckel
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In news:

Back at dining-room headquarters, they tried their hands at DNA extraction, targeting the plastid genes matK and rbcL to generate barcodes .
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