[ awk-sin ]
/ ˈɔk sɪn /
Save This Word!
a class of substances that in minute amounts regulate or modify the growth of plants, especially root formation, bud growth, and fruit and leaf drop.
QUIZ YOURSELF ON PARENTHESES AND BRACKETS APLENTY!
Set some time apart to test your bracket symbol knowledge, and see if you can keep your parentheses, squares, curlies, and angles all straight!
Question 1 of 7
Let’s start with some etymology: What are the origins of the typographical word “bracket”?
First appeared around 1750, and is related to the French word “braguette” for the name of codpiece armor.
First appeared in 1610, based on the French word “baguette” for the long loaf of bread.
First appeared in 1555, and is related to the French word “raquette” for a netted bat.TAKE THE QUIZ TO FIND OUT
OTHER WORDS FROM auxinaux·in·ic, adjective
Words nearby auxin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
Example sentences from the Web for auxin
The hormones, auxin and cytokinin, induced the zinnia cells to produce lignin, a polymer that makes wood firm.No Trees Harmed: MIT Aims to One Day Grow Your Kitchen Table in a Lab|Jason Dorrier|January 24, 2021|Singularity Hub
British Dictionary definitions for auxin
/ (ˈɔːksɪn) /
any of various plant hormones, such as indoleacetic acid, that promote growth and control fruit and flower development. Synthetic auxins are widely used in agriculture and horticulture
Word Origin for auxin
C20: from Greek auxein to grow
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for auxin
[ ôk′sĭn ]
Any of various hormones or similar substances that promote and regulate the growth and development of plants. Auxins are produced in the meristem of shoot tips and move down the plant, causing various effects. Auxins cause the cells below the shoot apex to expand or elongate, and this (rather than cell division) is what causes the plant to increase in height. In woody plants, auxins also stimulate cell division in the cambium, which produces vascular tissue. Auxins inhibit the growth of lateral buds so that the plant grows upwards more than outwards. They can be produced artificially in laboratories for such purposes as speeding plant growth and regulating how fast fruit will ripen.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.