Ziphiinæ

zif-i-ī′nē, n.pl. a subfamily of Physteridæ , the ziphioid or zip hi i form cetaceans—the typical genus Ziph′ius .— n.pl. Ziphiī′dæ , the ziphiinæ rated as a family apart from Physteridæ , and divided into Ziphiinæ and Anarnacinæ .— adjs. Ziphiī′form ; Ziph′ioid . [Gr. xiphios , the sword-fish— xiphos , a sword.]