A sidewinding snake uses less energy to cover the same distance as a laterally undulating snake uses.
The dancers’ arms undulated in unison to add to the ethereal effect.
followed her through the door straight into a pool of red and undulating light that locked him where he stood.
Toni Morrison -- Beloved
Above, the surface of the water was an undulating mirror of brightness,
John Steinbeck -- The Pearl
A silver ring fish floated by them, undulating, and closing like an iris, instantly, around food particles, to assimilate them.
Ray Bradbury -- The Martian Chronicles
The wide bosom of the Tappan Zee lay motionless and glassy, excepting that here and there a gentle undulation waved and prolonged the blue shadow of the distant mountain.
Washington Irving -- The Legend of Sleepy Hollow
If you had watched your patient carefully you would have seen this undulation in every department of his life—his interest in his work, his affection for his friends, his physical appetites, all go up and down.
C.S. Lewis -- The Screwtape Letters
His arm, a long molasses undulation,
Ray Bradbury -- Something Wicked This Way Comes
John was asleep and I hated to waken him, so I kept still and watched the moonlight on that undulating wall-paper till I felt creepy.
Charlotte Perkins Gilman -- The Yellow Wallpaper
The interference undulates and rises.
Haruki Murakami -- After Dark
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(NICK and MARTHA move apart now and dance on either side of where GEORGE and HONEY are sitting; they face each other, and while their feet move but little, their bodies undulate congruently. . . . . It is as if they were pressed together)
Edward Albee -- Who’s Afraid of Virginia Woolf?
As he walks toward the door, the flagstone path seems to undulate beneath his feet like a fun-house floor.
Neal Shusterman -- Unwind
The wheeze grows worse and I close my eyes, beginning to float on a sea of dark, undulating waves.
Nicholas Sparks -- The Longest Ride
Colin had never understood this before, but now thousands of strings were fluttering over and around and past him, and they were both tiny broken beams of light and endless, undulating waves.
John Green -- An Abundance of Katherines
I think I see something darken her expression, but I can’t really tell because every part of my body is undulating, and I swear I might just come inside-out right here.
Gayle Forman -- Where She Went
Brown, lifeless, undulating earth, bare trees, a gray, featureless sky.
Rick Yancey -- The 5th Wave
The wheat rose and the ripening heads bent in the prairie wind, a rippling curtain, an endless, undulating sea that stretched to the horizon.
Rick Yancey -- The Infinite Sea
Once there, she rested, feeling the water beneath her, smooth and undulating like gelatin, fathoms deep.
Dave Eggers -- The Circle
I tried hacking at the tongue with my shears, but it was too sinewy and tough, a rope of undulating muscle, and my shears too dull.
Ransom Riggs -- Miss Peregrine’s Home for Peculiar Children
I imagined the branches turning to arms; the leaves undulated like green hands.
Rick Riordan -- The Trials of Apollo
On the stairs leading to the gallery nearly twenty small boys were clustered, shoulder to shoulder, and the solid ranks undulated with the constant jerking of restless elbows straining under tight woolen jackets.
Elizabeth George Speare -- The Witch of Blackbird Pond
The curtains were streamers, undulating from the breeze made by the door closing behind me.
Gail Carson Levine -- Ella Enchanted
For hours, Esperanza watched the undulating land pass in front of her.
Pam Munoz Ryan -- Esperanza Rising
It’s only slightly better than the other word that followed me for years after my mom’s death, a snakelike hiss, undulating, leaving its trail of poison: Suicide.
Lauren Oliver -- Delirium
The island is fringed with the green, undulating marshes of the southern coast; shrimp boats ply the waters around her and fishermen cast their lines along her bountiful shores.
Pat Conroy -- The Water is Wide
In any case he can’t whisper back, because he has to look straight ahead at the horizon, or at the white lines of the road that washes toward us, wave after slowly undulating wave.
Margaret Atwood -- Cat’s Eye
From the waist down, his body was one giant serpent trunk—about eight feet of green tail undulating behind him as he moved.
Rick Riordan -- The Blood of Olympus
"Now, a waterhorse beneath the waves has but fish’s teeth," said Rupert, wiggling his palm like an undulating fish, "and feeds on snails and waterweeds and cold, wet things.
Diana Gabaldon -- Outlander
The carpet was lush, cream colored and undulating as if swept by tiny winds.
Dave Eggers -- A Hologram for the King
I watched the beads clicking and undulating in the slipstream of their departure, rippling with the sway of the girl’s hips.
Donna Tartt -- The Goldfinch
The ground is too bright and shiny and keeps undulating.
Suzanne Collins -- Catching Fire
From time to time she would open her mouth wide, and I could see her tongue undulate faintly.
Harper Lee -- To Kill a Mockingbird
She had an undulating, but oftentimes a sharp and irregular movement.
Nathaniel Hawthorne -- The Scarlet Letter
Ford pressed a large red button at the bottom of the screen and words began to undulate across it.
Douglas Adams -- The Hitchhiker’s Guide to the Galaxy
At most you feel them as a whisper or the wave of a whisper undulating down.
Alice Sebold -- The Lovely Bones
He recited a lengthy prayer from the Koran, his nasal voice undulating through the sudden hush of the stadium’s crowd.
Khaled Hosseini -- The Kite Runner
He gestured with an undulating arm, and above it appeared what looked to Clary like a hunk of rock crystal—only it was more luminous, more sheer, silvery, and beautiful.
Cassandra Clare -- City of Lost Souls
Before the night shut down she was seen with sails idly flapping as she gently rolled on the undulating swell of the sea.
Bram Stoker -- Dracula
The sun broke through the clouds and shone upon a vast, undulating white plain.
Helen Keller -- Story of My Life
All summer Perry undulated between half-awake stupors and sickly, sweat-drenched sleep.
Truman Capote -- In Cold Blood
There was about it an undulating and aerial grace, such as one might dream of for some mythic and allegorical being.
Harriet Beecher Stowe -- Uncle Tom’s Cabin
They made an undulating ridge, often rising almost to a thousand feet, and here and there falling again to low clefts or passes leading into the eastern land beyond.
J.R.R. Tolkien -- The Fellowship of the Ring
"It is a wonderful place, the moor," said he, looking round over the undulating downs, long green rollers, with crests of jagged granite foaming up into fantastic surges.
Arthur Conan Doyle -- The Hound of the Baskervilles
From behind us the last long rays of light played across the campus, accenting every slight undulation of the land, emphasizing the separateness of each bush.
John Knowles -- A Separate Peace
Nestled in an undulating patchwork of beech forests, lakes, and clearings were 140 cottages, a shopping mall, a barbershop, a post office, a dentist’s office, a sauna, a hospital, training facilities, and dining halls.
Laura Hillenbrand -- Unbroken
Round and round they went with their snakes, snakily, with a soft undulating movement at the knees and hips.
Aldous Huxley -- Brave New World
I groped into consciousness room dark, blinds closed, shadows undulating in air-conditioned waves.
Ellen Hopkins -- Crank
Horrified, transfixed, Frank stared as its undulating body cut a wide, curving track through the thick dust on the floor, coming closer and closer — What was he to do?
J.K. Rowling -- Harry Potter and the Goblet of Fire
It was the only motion in the hall, a whiplash line undulating sinuously from side to side.
Christopher Paolini -- Eldest
Sophie His sister, wrapped in an undulating silver glow, was floating in the air directly before him.