- a small, double-membraned organelle of plant cells and certain protists, occurring in several varieties, as the chloroplast, and containing ribosomes, prokaryotic DNA, and, often, pigment.
Origin of plastid
1875–80; < German Plastide < Greek plastid-, stem of plástis, feminine derivative of plástēs modeler, creator, derivative of plássein to form
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for plastid
Vacuoles are seen in cells; and there is an opinion that these may be a special kind of plastid: some vacuoles pulsate.The Ethics of Medical Homicide and Mutilation
- any of various small particles in the cytoplasm of the cells of plants and some animals that contain pigments, starch, oil, protein, etcSee chromoplast
C19: via German from Greek plastēs sculptor, from plassein to form
Word Origin and History for plastid
Online Etymology Dictionary, © 2010 Douglas Harper
- 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.trophoplast
- One of the granules of foreign or differentiated matter, food particles, or waste material in cells.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- An organelle found in the cells of plants, green algae, red algae, and certain other protists. Like mitochondria, plastids have an inner and outer membrane, and contain their own DNA and ribosomes. Some plastids, such as the chloroplasts in plant leaves, contain pigments.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.