dilation

Such a drive would also avoid the uncomfortable consequences of time dilation.
New Warp Drive Research Dashes Faster-Than-Light Travel Dreams—but Reveals Stranger Possibilities|Sam Baron|April 18, 2021|Singularity Hub
Yet the technique, which uses a laser scan to generate an image of the retina, captures only about 80 percent of the retinal surface area, so you’ll still need an eye exam that requires dilation in the near future, Herz says.
How to safely get an eye exam and buy glasses during the pandemic|Lindsey Konkel|April 12, 2021|Washington Post
This is gravitational time dilation, where time flows more slowly the stronger the gravitational field.
This Tenet Shows Time Travel May Be Possible - Issue 98: Mind|Sidney Perkowitz|March 24, 2021|Nautilus
These molecules tell the brain to increase the dilation of blood vessels, releasing toxic chemicals.
New drugs that block a brain chemical are game changers for some migraine sufferers|Karen J. Bannan|March 22, 2021|Science News

During the sessions, participants' brainwaves and pupil dilation were measured.
Heavy media multitasking might make you more forgetful|Kat Eschner|October 28, 2020|Popular-Science
After all, women now use Facebook to share sonogram pictures, breast-feeding tips, and even cervical dilation during labor.
Birth as Performance Art?|Jennifer Block|October 17, 2011|DAILY BEAST
Breadth is the dilation of the heart, length is long-suffering, height is hope, and depth is faith.
A Philosophical Dictionary, Volume 1 (of 10)|Franois-Marie Arouet (AKA Voltaire)
Systole and diastole, the contraction and dilation of the heart and arteries.
Essays|Ralph Waldo Emerson
His eyes, wide open, had a ghastly gleam, which the dilation of the pupils rendered all the more hideous.
The Yellow Rose|Mr Jkai
They are capable of contraction, of dilation, of partial interpenetration and distortion, but never of dissolution.
The Non-religion of the Future: A Sociological Study|Jean-Marie Guyau
She looked at him in a mighty wonder, her dark eyes open to their widest, and looking black by the extreme dilation of the pupils.
The Trampling of the Lilies|Rafael Sabatini

Scientific definitions for dilation

dilation

[ dī-lā′shən, dĭ- ]

The widening or stretching of an opening or a hollow structure in the body.