[i-rah-tuh
m, i-rey-, i-rat-uhm] 
[-tuh] . | 1. | an error in writing or printing. |
| 2. | a statement of an error and its correction inserted, usually on a separate page or slip of paper, in a book or other publication; corrigendum. |
| er·ra·tum (ĭ-rä'təm, ĭ-rā'-) n. pl. er·ra·ta (-tə) An error in printing or writing, especially such an error noted in a list of corrections and bound into a book. [Latin errātum, from neuter past participle of errāre, to stray; see ers- in Indo-European roots.] |