indolebutyric acid

[in-dohl-byoo-tir-ik, in-]
noun Biochemistry.
a white or yellowish, crystalline, water-insoluble powder, C 12 H 13 O 2 N, a plant hormone similar to indoleacetic acid and used for the same purposes.

1935–40; indole + butyric Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
indolebutyric acid (ˌɪndəʊlbjuːˈtɪrɪk)
a synthetic auxin used for stimulating plant growth and root formation. Formula: C12H13NO2)

Collins English Dictionary - Complete & Unabridged 10th Edition
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