molecular condom
n.— «For a decade now, scientists have been working to develop an HIV-blocking vaginal gel, a microbicide often called a molecular condom.» —“Better than a Condom?” by Jeneen Interlandi Newsweek Aug. 11, 2009. (source: Double-Tongued Dictionary)
Further reading
Enthusiastic book recommendations! Martha’s savoring the biography of Alexander von Humboldt, the 19th-century explorer, polymath, and naturalist who revolutionized our understanding of nature and predicted the effects of human activity on...
Scientists have named some recently discovered species of tree frogs after characters from Star Trek. Why? Because of the boops and trills and other sounds that these frogs make. And: naming your children with the virtues you hope they’ll...