biped
n.
"animal with two feet," 1640s, from Latin bipedem (nominative bipes) "two-footed," as a plural noun, "men;" from bi- "two" (see bi-) + pedem (nominative pes) "foot" (see foot, n.).
〔李〕n. 二足动物 [bi- =two] ←-ped，-pede [GK] =...footed animal表示“⋯足动物”
〔蒋〕[bi-两个，ped足] 两足的，两足动物