keystone
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Southern red wood ants are considered a keystone species, meaning they play an important role in supporting healthy ecosystems.
From BBC ● Jun. 28, 2026
Sea otters are a keystone species in kelp forest ecosystems, eating sea urchins that would otherwise consume the kelp, according to the aquarium.
From Los Angeles Times ● Apr. 29, 2026
She pointed to the 1967 Outer Space Treaty, a keystone document on international space law that President Lyndon Johnson signed onto.
From Salon ● Apr. 9, 2026
Last year, some 1,000 U.S. troops withdrew from neighboring Niger, ending a nearly decadelong partnership that was the keystone of U.S. counterterrorism operations in the region.
From The Wall Street Journal ● Nov. 2, 2025
Standing under the narrow arch I glanced up, wondering if that keystone too was mortared with bone and blood.
From "The Left Hand of Darkness" by Ursula K. Le Guin
Vocabulary lists containing keystone
