Numerical prefixes are prefixes usually derived from the words for numbers in various languages, most commonly Greek and Latin, although this isn't always the case. Occurrences Numerical prefixes occur in 19th, 20th and 21st century coinages, mainly the terms that're used in relation to or that're the names of technological innovations, such as and . They occur in constructed words such as systematic names. Systematic names use numerical prefixes derived from Greek, with one principal exceptio… (More on Tri-)