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IAA

IAA may refer to:

In science and medicine
  • Indole-3-acetic acid (plant hormone)
  • Aux/IAA repressors, a class of early auxin responsive transcription factors in plants
  • Insulin autoantibody, used in diagnosing Latent autoimmune diabetes
  • Interrupted aortic arch
  • International Association for Aerobiology
  • Instituto de Astrofísica de Andalucía, for the (IAA-CSIC) research institute in Spain
  • iodoacetamide, an alkylating agent
In healthcare organisations
  • Independent Ambulance Association representing private ambulance services in the United Kingdom
In aviation
  • Indianapolis Airport Authority
  • Iran Aseman Airlines (call-sign IAA)
  • Irish Aviation Authority
  • Israel Airports Authority
  • International Academy of Astronautics
In computing
  • Interactive Achievement Awards
In education
  • Idyllwild Arts Academy, part of the Idyllwild Arts Foundation
  • IMSA Alumni Association
  • Intercollegiate Athletic Association (formerly), now the National Collegiate Athletic Association (NCAA)
  • Interlochen Arts Academy, part of the Interlochen Center for the Arts
  • The International Affairs Association (IAA) of the University of Pennsylvania
  • Inter-American Academy of Guayaquil, an international school in Ecuador
In politics
  • Information Affairs Authority of Bahrain
In sport
  • International Ammunition Association
  • International Aquathlon (underwater wrestling) Association
Other associations
  • Immigration Appellate Authority (UK)
  • Indian Association of Alberta
  • Institute for Applied Autonomy
  • Institute of Actuaries of Australia
  • Instituto Antártico Argentino
  • Instituto de Arqueología Amazónica
  • Instituto de Astrofísica de Andalucía
  • International Academy of Architecture
  • International Academy of Astronautics
  • International Actuarial Association
  • International Advertising Association
  • International Alpaca Association
  • Investment Adviser Association
  • Islamic Army of Aden
  • Israel Antiquities Authority
  • Israeli Astronomical Association
Other uses
  • Intelligence Authorization Act (1991 - U.S.)
  • Internationale Automobil-Ausstellung, International Motor Show Germany
  • Id al Adha
The Collaborative International Dictionary

IAA

IAA \IAA\ n. Indoleacetic acid, a plant hormone promoting elongation of stems and roots. [Acronym]

Syn: indoleacetic acid.

IAA

indoleacetic acid \in"dole*a*cet"ic ac"id\ ([i^]n"d[=o]l), n. (Chem., Bot.) A plant hormone ( C10H9NO2) recognized as the principle growth regulator in higher plants; called also heteroauxin. Abbreviated IAA. Chemically it is 1H-indole-3-acetic acid.

Usage examples of "iaa".

He'd never revealed what he'd seen, not to Deymorin, or anyone else, but he had argued with Anhel iaa over the ethics of her "necessary experimentation".

Anhel iaa feared that, should we three brothers reconcile, her reign was at an end.

He remembered Nikki challenging her, and Anhel iaa trying to force Nikki to comply with her plan.