AMPHIB'IOUS, adjective [See Amphibial.] 1. Having the power of living in two elements, air and water, as frogs, crocodiles, beavers, and the like. 2. Of a mixed nature; partaking of two natures; as, an amphibious breed.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI