What does arable mean?
The definition of arable
Ar”a*ble, a.
Etym: [F. arable, L. arabilis, fr. arare to plow, akin to Gr. ear, to plow. See Earable.]

Fit for plowing or tillage; — hence, often applied to land which has been plowed or tilled.

Ar”a*ble, n.
Arable land; plow land.