Ptime in ptranslation

Both minute and second owe their existence as words to one famous book from Classical Antiquity. Yet their etymologies are a surprising mix, with not only Greek and Latin but also Arabic ingredients. How come?


A 16th-century engraving of Ptolemy

Let’s start with the book: it’s called the Almagest and was written in the second century CE by the mathematician and astronomer Claudius Ptolemy, a Greek in Roman Egypt. In it, he did what scholars had been doing for ages: divide the circle into 360 degrees, each degree into sixty minutes and each minute into sixty seconds.* But ‘minute’ and ‘second’ were not the words he used, for they did not yet exist. What he wrote was ‘first sixtieth’ (prota heksēkosta) and ‘second sixtieth’ (deutera heksēkosta), which in a freer translation might come out as ‘one sixtieth of the first order’ and ‘one sixtieth of the second order’. Continue reading