indoleacetic acid

noun
in·​dole·​ace·​tic acid | \ˌin-(ˌ)dō-lə-ˈsē-tik- \

Definition of indoleacetic acid 

: a crystalline plant hormone C10H9NO2 that is a naturally occurring auxin promoting growth and rooting of plants

First Known Use of indoleacetic acid

1937, in the meaning defined above

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The first known use of indoleacetic acid was in 1937

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indoleacetic acid

noun
in·​dole·​ace·​tic acid | \ˈin-ˌdōl-ə-ˌsēt-ik- \

Medical Definition of indoleacetic acid 

: a crystalline compound C10H9NO2 that is formed from tryptophan in plants and animals, is present in small amounts in normal urine, and acts as a growth hormone in plants

called also heteroauxin

More from Merriam-Webster on indoleacetic acid

Britannica.com: Encyclopedia article about indoleacetic acid

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