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ethephon

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WordReference Random House Unabridged Dictionary of American English © 2026

eth•e•phon n. [Chem.]

Botany, Chemistrya solid compound, C₂H₆ClO₃P, used as a growth regulator to accelerate the ripening of tomatoes, citrus fruit, apples, and other crops.

1970–75; as shortening of the chemical name 2-chloroethanephosphonic acid; see chloro-, ethane, phospho-, -onic

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