Plastid Plas"tid, Plastide Plas"tide, n. [Gr. ?, ?, a creator.] 1. (Biol.) A formative particle of albuminous matter; a monad; a cytode. See the Note under {Morphon}. [Archaic] --Haeckel. [1913 Webster]

2. (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. [1913 Webster +PJC]

The Collaborative International Dictionary of English. 2000.

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