[plas-tid] /ˈplæs tɪd/

noun, Cell Biology.
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.
any of various small particles in the cytoplasm of the cells of plants and some animals that contain pigments, starch, oil, protein, etc See chromoplast

1876, from German plastid, coined by Haeckel from Greek plastos “molded, formed” (see plaster) + -id.

plastid plas·tid (plās’tĭd)

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.


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