Question: What is the Greek definition of auxins?
About the article "Botany", section "Plant hormones".

Candidate passages:
Auxins derive their name from the Greek word αυξειν ("auxein" - "to grow/increase").
They were the first of the major plant hormones to be discovered.
The (dynamic and environment responsive) pattern of auxin distribution within the plant is a key factor for elongation during growth of the stem and root, its reaction to its environment, and specifically for development of plant organs (such as leaves or flowers).
It is achieved through very complex and well coordinated active transport of auxin molecules from cell to cell throughout the plant body — by the so-called polar auxin transport.
Thus, a plant can (as a whole) react to external conditions and adjust to them, without requiring a nervous system.
Auxins typically act in concert with, or in opposition to, other plant hormones.
For example, the ratio of auxin to cytokinin in certain plant tissues determines initiation of root versus shoot buds.
On the molecular level, all auxins are compounds with an aromatic ring and a carboxylic acid group.
The most important member of the auxin family is indole-3-acetic acid (IAA).
IAA generates the majority of auxin effects in intact plants, and is the most potent native auxin.
And as native auxin, its stability is controlled in many ways in plants, from synthesis, through possible conjugation to degradation of its molecules, always according to the requirements of the situation.
However, molecules of IAA are chemically labile in aqueous solution, so it is not used commercially as a plant growth regulator.
The four naturally occurring (endogenous) auxins are IAA, 4-chloroindole-3-acetic acid, phenylacetic acid and indole-3-butyric acid; only these four were found to be synthesized by plants.
However, most of the knowledge described so far in auxin biology and as described in the article below, apply basically to IAA; the other three endogenous auxins seems to have rather marginal importance for intact plants in natural environments.
Alongside endogenous auxins, scientists and manufacturers have developed many synthetic compounds with auxinic activity.
Synthetic auxin analogs include 1-naphthaleneacetic acid, 2,4-dichlorophenoxyacetic acid (2,4-D), and many others.
Some synthetic auxins, such as 2,4-D and 2,4,5-trichlorophenoxyacetic acid (2,4,5-T), are used also as herbicides.
Broad-leaf plants (dicots), such as dandelions, are much more susceptible to auxins than narrow-leaf plants (monocots) such as grasses and cereal crops, so these synthetic auxins are valuable as synthetic herbicides.
Auxins are also often used to promote initiation of adventitious roots, and are the active ingredient of the commercial preparations used in horticulture to root stem cuttings.
They can also be used to promote uniform flowering and fruit set, and to prevent premature fruit drop. 
Fluroxypyr is an herbicide in the class of synthetic auxins.
It is used to control broadleaf weeds and woody brush.
It is formulated as the 1-methylheptyl ester (fluroxypyr-MHE). 
Auxins are compounds that positively influence cell enlargement, bud formation and root initiation.
They also promote the production of other hormones and in conjunction with cytokinins, they control the growth of stems, roots, and fruits, and convert stems into flowers.
Auxins were the first class of growth regulators discovered.
They affect cell elongation by altering cell wall plasticity.
They stimulate cambium, a subtype of meristem cells, to divide and in stems cause secondary xylem to differentiate.
Auxins act to inhibit the growth of buds lower down the stems (apical dominance), and also to promote lateral and adventitious root development and growth.
Leaf abscission is initiated by the growing point of a plant ceasing to produce auxins.
Auxins in seeds regulate specific protein synthesis, as they develop within the flower after pollination, causing the flower to develop a fruit to contain the developing seeds.
Auxins are toxic to plants in large concentrations; they are most toxic to dicots and less so to monocots.
Because of this property, synthetic auxin herbicides including 2,4-D and 2,4,5-T have been developed and used for weed control.
Auxins, especially 1-Naphthaleneacetic acid (NAA) and Indole-3-butyric acid (IBA), are also commonly applied to stimulate root growth when taking cuttings of plants.
The most common auxin found in plants is indole-3-acetic acid or IAA.
The correlation of auxins and cytokinins in the plants is a constant (A/C = const.
). 
Cytokinins or CKs are a group of chemicals that influence cell division and shoot formation.
They were called kinins in the past when the first cytokinins were isolated from yeast cells.
They also help delay senescence of tissues, are responsible for mediating auxin transport throughout the plant, and affect internodal length and leaf growth.
They have a highly synergistic effect in concert with auxins, and the ratios of these two groups of plant hormones affect most major growth periods during a plant's lifetime.
Cytokinins counter the apical dominance induced by auxins; they in conjunction with ethylene promote abscission of leaves, flower parts, and fruits.
The correlation of auxins and cytokinins in the plants is a constant (A/C = const.
). 
In plant tissue culture IBA and other auxins are used to initiate root formation in vitro in a procedure called micropropagation.
Micropropagation of plants is the process of using small samples of plants called explants and causing them to undergo growth of differentiated or undifferentiated cells.
In connection with cytokinins like kinetin, auxins like IBA can be used to cause the formation of masses of undifferentiated cells called callus.
Callus formation is often used as a first step process in micropropagation where the callus cells are then caused to form other tissues such as roots by exposing them to certain hormones like auxins that produce roots.
The process of callus to root formation is called indirect organogenesis whereas if roots are formed from the explant directly it is called direct organogenesis.
In a study of Camellia sinensis the effect of three different auxins, IBA, IAA and NAA were examined to determine the relative effect of each auxin on root formation.
According to the result for the species IBA was shown to produce a higher yield of roots compared to the other auxins.
The effect of IBA is in concurrence with other studies where IBA is the most commonly used auxin for root formation.