The word data is plural in Latin. But that etymological fact may not make it plural in English at this point. On this week’s edition of “That’s What They Say,” host Rina Miller and Professor of English at the University of Michigan Anne Curzan talk about whether the word data should be plural or singular. English borrowed the word data from Latin in which it is plural, the singular is datum . But, in scientific technical writing you will see data very often as plural. "Many speakers have reinterpreted data as singular, as a mass noun much like information, so then you’ll see data is . The good news is for those of us who use it as a singular, and there are a lot of us, is that that is becoming more and more accepted, and in fact at this point if you look at the American Heritage Dictionary and the usage panel note on this, only 23% of the usage panel still rejects data as a singular," explains Curzan. Listen to the full interview to hear more examples of making tricky words plural, including syllabus, focus, alumnus , and hippopotamus .