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
Old. Elderly. Senior. Why are we so uncomfortable when we talk about reaching a certain point in life? An 82-year-old seeks a more positive term to describe how she feels about her age. And: a linguist helps solve a famous kidnapping case, using the...
