tetrapterus

[Pref. tetra-, and Gr. pteron =a fin.] Palæont.: A genus of Xiphiide (q. v.), from the Chalk of Lewes and Maestricht and the London Clay of Sheppey. tet-rap-tōte, subst. [Gr. tetraptōtos =with four grammatical cases: tetra -four, and ptosis =acase.] Gram.: A noun which has four cases only. tět-ra-py-rên-oŭs, adj. [Pref. tetra-, and Gr. pyren the stone of stone-fruit.] Bot.: Having four stones. 4048