a. Zoogeog. [f. mod.L. Tropicalia (f. Gr. τροπικός tropic + ἅλς sea) + -AN.] Belonging to the marine region called Tropicalia, comprising the seas between the isocrymes of 68° Fahr. on each side of the equator.
1877. T. Gill, in Field & Forest, III. Dec., 99. A primary combination of the marine faunas is most natural under the categories of tropicalian, arctalian, and notalian.
1888. Proc. Biol. Soc. Washington, II. 34 (Cass. Supp.). Generic and specific modifications of the Arctalian and Tropicalian realms.
