the size of the observable universe
scientists often work with phenomena that are not directly observable
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Phenotype refers to how one’s genetic makeup is expressed in observable traits, including eye color, height and blood type.—Gary Robbins, San Diego Union-Tribune, 3 Apr. 2025 Reasonable suspicion testing allows a supervisor to request a drug or alcohol test if there are observable and objective signs that an employee may be under the influence.—Johnny C. Taylor Jr., USA TODAY, 25 Mar. 2025 And When To See The Total Lunar Eclipse This total lunar eclipse will be visible across the night side of the world, with the entire event observable from North America.—Jamie Carter, Forbes, 4 Mar. 2025 Blame shifts elsewhere, explanations contradict observable reality, and mistakes become someone else’s problem.—Nate Bennett, Forbes.com, 26 Mar. 2025 See All Example Sentences for observable
Word History
Etymology
borrowed from Middle French & Latin; Middle French, "that must or can be observed," borrowed from Latin observābilis "capable of being observed," from observāre "to give attention to, watch carefully, observe" + -bilis "capable (of acting) or worthy of (being acted upon)" — more at -able
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