from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of several pigmented cytoplasmic organelles found in plant cells and other organisms, having various physiological functions, such as the synthesis and storage of food.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of various organelles found in the cells of plants and algae, often concerned with photosynthesis
from the GNU version of the Collaborative International Dictionary of English
- n. A formative particle of albuminous matter; a monad; a cytode. See the Note under morphon.
- n. 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.
from The Century Dictionary and Cyclopedia
- n. 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.
- n. 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. 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.
- Having the character or quality of a plastid; plastic or plasmic.
- n. A general name for any permanent organ of the cell except the nucleus and centrosome.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. any of various small particles in the cytoplasm of the cells of plants and some animals containing pigments or starch or oil or protein
Origin, targeting, and function of the apicomplexan plastid.
A plastid of probably green algal origin in apicomplexan parasites.
Nuclear-encoded proteins target to the plastid in Toxoplasma gondii and Plasmodium falciparum.
The earliest angiosperms: Evidence from mitochondrial, plastid, and nuclear genomes.
By analyzing DNA sequences contained in the plastid of the thecate amoeba Paulinella, researchers have shown that it is a recent endosymbiont whose genome features are virtually unchanged from those of its cyanobacterial progenitor.
Edit yeah we all know about creo “kinds” and the runaway goddidit speciation/speculation get them to answer a question about mitochondrial endosymbiosis and ask them which one the plastid or the rest of the eucaryote was specially created
Genes encoding plastid acetyl-Co-A carboxylase . . . and the evolutionary history of wheat.
No matter what we may call this point of vital activity in a cell -- whether it be a bioplast, a plastid, a physiological unit, or a granule of "elementary life-stuff" -- it simply performs the one single function of life to which it is specifically assigned in the process of "building up" any one identical individual of a species, whether it be a man, an ape, a tree, or a parasitic fungus.
For the great bulk of our globe is made up of the highly crystallized and non-fossiliferous rocks, which neither contain any elementary principle of life, nor exhibit the slightest trace of vital organism, even to the minutest living speck or plastid.
The body is conceived of as a cell-state or cell-republic, composed of innumerable plastid citizens, and its government, both in health and disease, is emphatically a government "of the cells, by the cells, for the cells."
Wordnik is becoming a not-for-profit! Read our announcement here.