• (a.) Not deciduous or falling, as the leaves of trees in autumn; lasting; evergreen; persistent; permanent; perennial.
In`de·cid'u·ous adjective Not deciduous or falling, as the leaves of trees in autumn; lasting; evergreen; persistent; permanent; perennial. « The indeciduous and unshaven locks of Apollo.» Sir T. Browne. 
not deciduous, as leaves. · (of trees) evergreen.