abbaco
n.— «In marked contrast to the Jesuits, Piarists taught in the vernacular, not Latin, and over philosophical mathematics they favoured “abbaco”, or mercantile arithmetic.» —“Sins of the fathers” by Miranda France Guardian (U.K.) May 22, 2004. (source: Double-Tongued Dictionary)
Further reading
Astronauts returning from space say they experience what’s called the overview effect, a new understanding of the fragility of our planet and our need to reflect on what humans all share as a species. A book about the end of the universe...
In the 15th century, the word respair meant “to have hope again.” Although this word fell out of use, it’s among dozens collected in a new book of soothing vocabulary for troubled times. Plus, baseball slang: If a batter...