• (a.) Of or pertaining to the Amphipoda.
Am·phip'o·dous adjective (Zoology) Of or pertaining to the Amphipoda. 
amphipodous Of or pertaining to the Amphipoda; having feet of two kinds. Related 'around, round, surrounding' units: ambi-; circ-; circum-; cyclo-, -cycle; gyro-; peri-.