The Battle of Grand Gulf was fought on April 29, 1863, during th: Formation of new words, called neologisms, based on Greek and/or Latin roots (for example television or optometry) is a highly productive process in English and in most modern European languages, so much so that it is often difficult to determine in which language a neologism originated. For this reason, American lexicographer Philip Gove attributed many such words to the "international scientific vocabulary" (ISV) when compiling Webster's Third New International Dictionary (1961). Another active word-formation process in English is the creation of acronyms,[229] words formed by pronouncing abbreviations of longer phrases as single words, e.g. NATO, laser, scuba.