transisthmianadj.
/tranzˈɪs(θ)mɪən/, /trɑːnzˈɪs(θ)mɪən/, /transˈɪs(θ)mɪən/, /trɑːnsˈɪs(θ)mɪən/, U.S. /trænzˈɪsmiən/, /træn(t)sˈɪsmiən/ Crossing or extending across an isthmus, esp. the Isthmus of Panama.
ΘΚΠ
the world > the earth > land > land mass > shore or bank > promontory, headland, or cape > [adjective] > isthmus
isthmic1585
two-sea'd1626
isthmian1654
transisthmian1850
isthmoid1855
1850 Christian Age (Cincinnati) 8 Feb. 22/4 Our American projects of trans-isthmian and trans-continental canals and railroads.
1885 Jrnl. Senate 12 in U.S. Congress. Serial Set (49th Congr., 1st Sess.) Our interests in..any transisthmian route which may be opened.
1902 Q. Rev. Oct. 674 The Key to any possible trans-isthmian canal.
1974 S. E. Morison European Discov. Amer.: Southern Voy. xi. 246 It became a thriving city at the northern end of the trans-isthmian mule track.
2008 US Fed News (Nexis) 1 Feb. Modern Panamanian history has been shaped by its transisthmian canal.
This entry has been updated (OED Third Edition, March 2019; most recently modified version published online March 2022).
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adj.1850