| plastid | <cell biology> Type of plant cell organelle, surrounded by a double membrane and often containing elaborate internal membrane systems. Partially autonomous, containing some DNA, RNA and ribosomes and reproducing itself by binary fission. Includes amyloplasts, chloroplasts, chromoplasts, etioplasts, leucoplasts, proteinoplasts and elaioplasts. Develop from proplastids. (31 Dec 1997) |
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| plastide | 1. <biology> A formative particle of albuminous matter; a monad; a cytode. See the Note under Morphon. 2. <botany> One of the many minute granules found in the protoplasm of vegetable cells. They are divided by their colours into three classes, chloroplastids, chromoplastids, and leucoplastids. Origin: Gr, a creator. Source: Websters Dictionary (01 Mar 1998) |
| plastidozoa | <zoology> Same as Protoza. Origin: NL, fr. Gr, creator + animal. Source: Websters Dictionary (01 Mar 1998) |
| plastids | Self-replicating cytoplasmic organelles of plant and algal cells that contain pigments and may synthesise and accumulate various substances. Plastids are used in phylogenetic studies. (12 Dec 1998) |
| plastidule | <biology> One of the small particles or organic molecules of protoplasm. Origin: Dim. Fr. Plastid. Source: Websters Dictionary (01 Mar 1998) |
| blood plastid | Any basic, morphologic unit in the biologic composition of blood, e.g., an erythrocyte. (05 Mar 2000) |
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