13-letter words containing m, a, r, n, i, s
- west germanic — a subbranch of Germanic that includes English, Frisian, Flemish, Dutch, Plattdeutsch, Yiddish, and German. Abbreviation: WGmc.
- xanthochroism — a condition in certain animals, esp aquarium goldfish, in which all skin pigments other than yellow and orange disappear
- zoosporangium — a sporangium or spore case in which zoospores are produced.