Gentium (Latin for "of the nations") is a Unicode serif typeface designed by Victor Gaultney. Gentium fonts are free and open source software, and are released under the SIL Open Font License (OFL), which permits modification and redistribution. Gentium has wide support for languages using the Latin, Greek, and Cyrillic alphabets, and the International Phonetic Alphabet. Gentium Plus variants released in November 2010 now include over 5,500 glyphs and advanced typographic features through OpenType and Graphite.
The original release of Gentium defined roughly 1,500 glyphs covering almost all of the range of Latin characters used worldwide, as well as monotonic and polytonic Greek, designed to flow in harmony with the Latin. Gentium comes with a variant called GentiumAlt ("Gentium Alternative"), which contains flatter diacritics intended to improve the appearance of letters with multiple diacritics, as well as a glyph variant of the Greek circumflex that resembles an inverted breve.