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Of or relating to a drainage basin whose surface water runs into the ocean or into another body of water having a connection to the ocean.

[exo- + Greek rhein, rhe-, to flow; see sreu- in Indo-European roots + -ic.]

ex′o·rhe′i·cal·ly adv.
References in periodicals archive ?
Site 1--Lake Tonga: naturally endorheic and artificially exorheic system.
Kor, Maharloo) and exorheic basins (Mond, Persian Gulf) of the Fars area, as detailed by Ramsey et al.
Kol River is one the major rivers of the exorheic Hormuzgan (Hormuz basin) which drains to the Persian Gulf at Straits of Hormuz and is inhabited by 25 fish species (Esmaeili et al.