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ethylene glycol
ethylene oxide
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etioplast

e·ti·o·plast [ tee ə plàst ] (plural e·ti·o·plasts)


noun 
Definition:
 
forerunner of plant chloroplast: a microscopic membranous sac with no pigment that occurs inside the cells of plants that are deprived of light. Etioplasts change into chloroplasts if they are exposed to light.

[<etiolated + -plast]
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