Definition of rivulus in English:


Pronunciation /ˈrivyələs/ /ˈrɪvjələs/

See synonyms for rivulus


  • A small tropical American fish of shallow fresh and brackish water. Often mistaken for a killifish or topminnow, the rivulus is distinguished by its tubular nostrils.

    Genus Rivulus, family Rivulidae: several species, many of which are spotted, in particular R. marmoratus


Modern Latin, from Latin, literally ‘small stream’.