无环族的

【医】 acyclic

无的英语翻译：

naught; nonexistence; not; nothing; without; lack; zero
【医】 a-; leipo-; lipo-; non-

环的英语翻译：

annulus; hem in; link; loop; ring; surround
【计】 ring up; toroid
【化】 ring
【医】 annuli; anulus; band; circle; circulus; cycle; cyclo-; gyro-; loop; orb
ring; verge

族的英语翻译：

a group of things with common features; clan; family; race; strain
【化】 alkaline earths; family; group; odd series; periodic family; sub-group
subgroup
【医】 group; race; series; tribe