Find the word definition

The Collaborative International Dictionary
Halisauria

Halisauria \Hal`i*sau"ri*a\ (h[a^]l`[i^]*s[add]"r[i^]*[.a]), n. pl. [NL., fr. Gr. "a`ls, "alo`s, sea + say^ros.] (Paleon.) The Enaliosauria.