concave

It only uses 1.0 gpf, with the help of two strong jets concealed in a concave rim beneath the seat that create a strong swirl during the flush.

From Slate ● Feb. 25, 2025

“My chest was concave trying to pull in breath.”

From BBC ● Oct. 10, 2024

"To bring this feature to a molecule, I envisioned encapsulating the rotator space by using bulky concave shaped stators."

From Science Daily ● Sep. 29, 2023

On the top and bottom of the cylinder, the metal had been pushed up in a concave shape, thrust out from pressure on the inside.

From Los Angeles Times ● Aug. 3, 2023

Although the Dutch version used two concave lenses, giving an upside-down image, Galileo used one convex lens and one concave lens, giving an upright image.

From "The Scientists" by John Gribbin

In the second book of his Dark Star trilogy, James coaxes beauty from dark thoughts, leaving readers with a concaved, mystical and African-inspired world that begins in free-fall.

From Los Angeles Times ● Feb. 15, 2022

Dorsal fins of this species may also be rounded on the tip but all are sharply concaved on the rear margin.

From Whales, Dolphins, and Porpoises of the Western North Atlantic A Guide to Their Identification by David Caldwell

The head is small relative to the body length and, when viewed laterally, is slightly concaved or scooped on the upper margin.

From Whales, Dolphins, and Porpoises of the Western North Atlantic A Guide to Their Identification by David Caldwell

San Francisco’s magnificent municipal building had concaved like an egg shell.

From Complete Story of the San Francisco Horror by Richard Linthicum

If a button is much concaved, the pin may be placed underneath.

From Textiles and Clothing by Kate Heintz Watson

The world below looked like a vast, shallow bowl, the sides concaving upwards around him to the horizon.

From Hoof and Claw by Sir Charles George Douglas Roberts