southeastward

from WordNet (r) 3.0 (2006)

southeastward
    adv 1: in a southeastward direction; "the river flows
           southeastward to the gulf" [syn: {southeastward},
           {southeastwardly}]
    adj 1: toward the southeast
    n 1: the compass point midway between south and east; at 135
         degrees [syn: {southeast}, {sou'-east}, {southeastward},
         {SE}]

from The Collaborative International Dictionary of English v.0.48

Southeastward \South`east"ward\, Southeastwardly
\South`east"ward*ly\, adv.
   Toward the southeast.
   [1913 Webster]