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
Centuries ago, monks who took a vow of silence developed their own hand signs, with hundreds of gestures, that are still in use today. Plus, how do speakers of different languages distinguish similar shades and tints of colors such as red, yellow...
Eels, orts, and Wordle! Sweden awarded its most prestigious literary award to a book about…eels. The Book of Eels reveals the mysterious life cycle of this sea creature and its significance for famous figures from Aristotle to Sigmund Freud. Plus...