Pupils dilate when someone looks at something they like.
Pupils dilate in a dark room or under the influence of some drugs.
They are measuring dilation in my arteries.
Her eyes began slowly to dilate, and she shivered as though with cold.
Oppenheim, E. Phillips -- The Malefactor
"The pupils of his little eyes are not dilated," said Dr. Meescham.
Kate DiCamillo -- Flora & Ulysses
After that, I break into an apothecary for willadonna, a physician’s staple that, when pressed into an oil, dilates the pupils wide enough for a Martial to pass as a Scholar or Tribesman for an hour or two.
Sabaa Tahir -- An Ember in the Ashes
His pupils dilate when he sees me.
Susan Ee -- Angelfall
The small boy in the next aisle shrank back as his dilated eyes spotted the weapon.
Marissa Meyer -- Cinder
I watched him vainly trying to make ground, his nostrils dilated, his ears back against his head.
Jojo Moyes -- Me Before You
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Slowly the pupils of his eyes dilated until they were back to normal, and the blood came back to his white cheeks.
Madeleine L’Engle -- A Wrinkle in Time
It sucks and booms and splashes and rumbles; it shifts and dilates and falls over itself; the labyrinth of Saint-Malo has opened onto a portal of sound larger than anything she has ever experienced.
Anthony Doerr -- All the Light We Cannot See
How his pupils must have shrunk and then dilated, open and vulnerable.
Alexandra Bracken -- The Darkest Minds
I began to sweat and felt my breath go haywire and something in my chest actually dilate painfully, like a rapidly expanding balloon.
William Styron -- Sophie’s Choice
How can they say that, when I’ve won a special mention for my essay on Temperance, about drunken men having car accidents and freezing to death in snowstorms because the alcohol dilates their capillaries?
Margaret Atwood -- Cat’s Eye
The giant’s eyes clicked and dilated.
Rick Riordan -- The Blood of Olympus
Now that I looked at him more closely, I realized that his pupils were dilated and strange.
Donna Tartt -- The Goldfinch
The color vanishes from his face and I can actually see his pupils dilate in fear.
Suzanne Collins -- Catching Fire
The room must be reading her heartbeat, her sweat, her pupil dilation.
Scott Westerfeld -- Uglies
"Peeta?" His eyes are like black pools, the pupils dilated so that the blue irises have all but vanished.
Suzanne Collins -- Mockingjay
His nostrils are dilated and his breath comes fast—his demons are driving him.
Upton Sinclair -- The Jungle
Her eyes opened wide, and the pupils dilated.
John Steinbeck -- The Grapes of Wrath
He peered inside Henrietta, dilated her cervix, and prepared to treat her tumor.
Rebecca Skloot -- The Immortal Life of Henrietta Lacks
Perhaps it was a result of taking in so much food; its stomach was grossly dilated.
Yann Martel -- Life of Pi
Her pupils dilated, pulsing in and out like small, ferocious olives.
Alice Sebold -- The Lovely Bones
When Clary stopped in front of him, his lids flew open, and she saw that the pupils of his eyes were dilated, all the gold swallowed up in black.
Cassandra Clare -- City of Bones
The horse rolled his eyes wildly, the whites rimming his dilated pupils.
Christopher Paolini -- Eragon
This dilated until it filled the room, and impelled me to take a candle and go in and look at my dreadful burden.
Charles Dickens -- Great Expectations
The injury that gave her the scar also damaged her eye—her pupil is so dilated it overwhelms her iris, and her left eye doesn’t move with the right one as she scans the Amity in front of her.
Veronica Roth -- Insurgent
Tom had stood, during this speech, with his hands raised, and his eyes dilated, like a man in a dream.
Harriet Beecher Stowe -- Uncle Tom’s Cabin
Laila Of all earthly pleasures, Laila’s favorite was lying next to Aziza, her baby’s face so close that she could watch her big pupils dilate and shrink.
Khaled Hosseini -- A Thousand Splendid Suns
Pheoby dilated all over with eagerness, "Tea Cake gone?"
Zora Neale Hurston -- Their Eyes Were Watching God
"But these pupils are dilated," she said.
Michael Crichton -- Jurassic Park
His nostrils dilated like those of a wild beast that scents its prey, and his lips, half opened, disclosed his white teeth, small and sharp like those of a jackal.
Alexandre Dumas -- The Count of Monte Cristo
The pupils were huge, dilated.
Cassandra Clare -- City of Ashes
He glanced over the back of the bench, dilating his nostrils, and thought as little of exchanging civilities with me as with my companion the cat.
Emily Bronte -- Wuthering Heights
Langdon fought the gag reflex and relaxed his chest while his pulmonary capillaries dilated.
Dan Brown -- Angels & Demons
His muzzle went up, his tail stiffened, and his nostrils dilated as he scented the air.
Jack London -- White Fang
Wandless, helpless, Pettigrew’s pupils dilated in terror.
J.K. Rowling -- Harry Potter and the Deathly Hallows
Snape stretched out his hands like a blind man and began to move up the stairs; Harry could have sworn his over-large nostrils were dilating, trying to sniff Harry out — trapped.
J.K. Rowling -- Harry Potter and the Goblet of Fire
The clockface itself was gone, replaced by a circular black hole that swelled and swelled like a dilating iris.
Stephen King -- The Shining
But First I Had to Pee Passing the mirror, I chanced a glance at Bree, crank embers glowing behind dilated black windows.
Ellen Hopkins -- Crank
He looked neither to the right nor the left, but his dilated eyes stared straight downhill to where the lamps were being lit, and the people were crowded in the street.
H.G. Wells -- The Invisible Man
The god’s huge eyes dilated.
Rick Riordan -- The Throne of Fire
(ASIDE) Something shot from my dilated nostrils, he has inhaled it in his lungs.
Herman Melville -- Moby Dick
Godfrey looked up at Nancy with a flushed face and smarting dilated eyes.
George Eliot -- Silas Marner
She lay on the couch, saliva dripping out of the corners of her mouth onto her red Gap T-shirt, her pupils dilated and rolling to the back of her head, heroin still flowing through her veins.
Wes Moore -- The Other Wes Moore
His nostrils dilated and he forced his lungs to drink in deep nothingness.
Ray Bradbury -- The Martian Chronicles
Over all the sand, with a slow falling, were raining down dilated flakes of fire, as of snow on alps without a wind.
Dante Alighieri -- Dante’s Inferno
After the soup the maid brought a boiled fowl—a piece of magnificence which caused the eyes of the diners to dilate in such a manner that they seemed ready to burst.