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
From Greek plastis, plastid-, feminine of plastēs, molder, from plastos, molded; see plastic.(American Heritage® Dictionary of the English Language, Fourth Edition)