taking a cookie break while studying is one of the most efficacious ways of rejuvenating the mind that I have ever discovered

Recent Examples on the Web

If a vaccine is efficacious, an EUA will require that the documentation and demonstration of efficacy be flawless. Jon Cohen, Science | AAAS, "Leader of U.S. vaccine push says he‘ll quit if politics trumps science," 3 Sep. 2020

Here's how to get rid of forehead lines with OTC fixes such as efficacious skincare ingredients and at-home laser treatments: Collagen-producing skincare. April Franzino, Good Housekeeping, "How to Get Rid of Forehead Wrinkles, According to Skincare Pros," 6 Aug. 2020

The brand’s Vitamin C Serum and D-Bronzi Serum are everything, and people swear by the line’s efficacious yet gentle formulas. Bella Cacciatore, Glamour, "This Drunk Elephant Retinol Cream Doesn’t Irritate My Sensitive Skin," 3 Apr. 2020

Certainly the myth of the cowboy is an efficacious myth, one based first of all upon a deep response to nature. Larry Mcmurtry, Harper's magazine, "American Cowboys," 28 Oct. 2019

The associated novel regimen will hopefully provide a shorter, more easily manageable and highly efficacious treatment for those in need. Beth Mole, Ars Technica, "How a new antibiotic destroys extremely drug-resistant tuberculosis," 16 Aug. 2019

In the past 20 years, this technology has proved efficacious. Costas Synolakis, WSJ, "The Art of Predicting Unpredictable Tsunamis," 3 Oct. 2018

Skinfix has quite literally built its name on offering efficacious products that address a variety of skin concerns, including dryness and eczema. Karina Hoshikawa, Allure, "Exclusive: Skinfix's Products Are Getting More Eco-Friendly Packaging — and Coming to Sephora," 19 Mar. 2019

The brand's Vitamin C Serum and D-Bronzi Serum are everything, and people swear by the line's efficacious yet gentle formulas. Bella Cacciatore, Glamour, "Drunk Elephant's Vegan Retinol Doesn't Irritate My Sensitive Skin," 26 Dec. 2018

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