equilateral
adj.
"having all sides equal," 1560s, from Late Latin aequilateralis, from aequi- (see equal, adj.) + lateralis (see lateral). Related: Equilaterally.
〔李〕[equi-;later;-ala.] a.等边的 n.等边形 ←later (L latus,lateris)=side 边
〔蒋〕[equ(i)相等，later边，-al…的] 等边的
〔蒋〕[equi-等，later边] 等边的