iaa

• Nom désignant une hormone végétale favorisant l'allongement des tiges et des racines, ou l'abréviation d'un groupe terroriste yéménite soutenant les objectifs d'Al-Qaïda.

A noun referring to a plant hormone that promotes elongation of stems and roots, or an acronym for a Yemen-based terrorist group supporting al-Qaeda's goals.

nom propre

1. C1formalscientific

   A naturally occurring plant hormone that promotes cell elongation in stems and roots, and is involved in many growth and behavioral processes.

   AIA (acide indole-3-acétique)

   • IAA is crucial for phototropism, the growth of plants towards light.
   • The application of synthetic IAA can stimulate root development in cuttings.
   • Researchers measured the concentration of IAA in the plant's shoot tips.

   Synonymesauxin

2. Terrorist GroupC1formalpolitical

   A Yemen-based militant organization that supports al-Qaeda's objectives, aiming to overthrow the Yemeni government and target Western interests.

   Groupe terroriste lié à al-Qaïda au Yémen

   • The IAA claimed responsibility for the attack on the tourist convoy.
   • International forces have been monitoring the activities of the IAA in the region.
   • The group, known as IAA, has been designated a terrorist organization by several countries.