experimental

adjective

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ex·per·i·men·tal | \ ik-ˌsper-ə-ˈmen-tᵊl

also -ˌspir- \

Definition of experimental

1 : of, relating to, or based on experience or experiment

2a : serving the ends of or used as a means of experimentation an experimental school

b : relating to or having the characteristics of experiment : tentative still in the experimental stage

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Synonyms for experimental

Synonyms

Examples of experimental in a Sentence

The fuel is being used on an experimental basis. an experimental procedure for patients suffering from leukemia

Recent Examples on the Web The results of the latest trial show that a high dose of the experimental malaria vaccine has a 77 percent efficacy rate at preventing malaria infections over the course of one year. — Theresa Machemer, Smithsonian Magazine, "New Malaria Vaccine Trial Reports 77 Percent Efficacy Rate," 27 Apr. 2021 An experimental vaccine that targets the most dangerous form of the malaria parasite was found to have an efficacy of 74% to 77% after 1 year in children from West Africa. — Meredith Wadman, Science | AAAS, "Malaria vaccine has striking early success after decades of disappointment," 23 Apr. 2021 The study, funded by the National Institutes of Health, isn’t just testing Moderna’s experimental variant vaccine as a third-shot immune booster. — The Salt Lake Tribune, "Tweaked COVID vaccines in testing aim to fend off variants," 13 Apr. 2021 Every country has different rules for determining when an experimental vaccine is safe and effective enough to use. — Joe Taschler, Milwaukee Journal Sentinel, "Pleasant Prairie site will play role in Pfizer/BioNTech COVID-19 vaccine distribution as UK approves vaccine's use," 6 Apr. 2021 But the results sure sound good: the experimental vaccine produced protective antibodies in 97% of participants. — Sy Mukherjee, Fortune, "Buy a COVID vaccine, get an HIV vaccine for free?," 6 Apr. 2021 Each of the experimental drugs could prevent HIV infections operating alone, and the companies can pursue such prophylactic uses individually. — Jonathan D. Rockoff, WSJ, "Gilead and Merck Join Forces to Develop Long-Acting HIV Treatment," 15 Mar. 2021 In 2019, The Associated Press included Atwater in a story about cancer patients seeking the use of experimental drugs. — Meg Kinnard, chicagotribune.com, "Sally Atwater, wife of late GOP strategist, dies at 69," 10 Mar. 2021 In 2019, The Associated Press included Atwater in a story about cancer patients seeking the use of experimental drugs. — Meg Kinnard, Star Tribune, "Sally Atwater, wife of late GOP strategist, dies at 69," 9 Mar. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'experimental.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.