| acetic solution | A vinegar. (05 Mar 2000) |
|---|---|
| naphthalene acetic acid | <chemical> A synthetic auxin, often used in plant physiology and in plant tissue culture media because it is more stable than IAA. (18 Nov 1997) |
| indole acetic acid | <biochemistry, plant biology> The most common naturally occurring auxin. Promotes growth in excised plant organs, induces adventitious roots, inhibits axillary bud growth, regulates gravitropism. (18 Nov 1997) |
| (2,4,5-trichlorophenoxy) acetic acid | A herbicide and defoliant synthesised by condensation of chloracetic acid and 2,4,5-trichlorophenol, used as the principal constituent of Agent Orange. (05 Mar 2000) |
| (2,4-dichlorophenoxy) acetic acid | A herbicide, more toxic to broad-leaved dicotyledonous plants (weeds) than to monocotyledonous ones (grains and grass), used with (2,4,5-trichlorophenoxy)acetic acid as a constituent of Agent Orange. (05 Mar 2000) |
| 5-hydroxyindole acetic acid | <biochemistry, tumour marker> This is a metabolite of serotonin that is excreted in the urine. Serotonin is a neurotransmitter that is synthesised from the amino acid tryptophan by enterochromaffin cells in the gut and bronchi. It is metabolised to 5-hydroxyindole acetic acid in the liver and then excreted in the urine. Elevations in 5-hydroxyindole acetic acid can indicate carcinoid tumour. The normal range in a 24 hour urine collection is 3 to 15 mg per 24 hours. Acronym: 5-HIAA (13 Nov 1997) |