1. etheostomoid - Noun
2. etheostomoid - Adjective
Pertaining to, or like, the genus Etheostoma.
Any fish of the genus Etheostoma and related genera, allied to the perches; -- also called darter. The etheostomoids are small and often bright-colored fishes inhabiting the fresh waters of North America. About seventy species are known. See Darter.
Source: Webster's dictionary