elasmobranch
Pronunciation: /ɪˈlazmə(ʊ)braŋk/
noun
Zoology- a cartilaginous fish of a group that comprises the sharks, rays, and skates. Compare with selachian.
- Subclass Elasmobranchii, class Chondrichthyes

Origin:
late 19th century: from modern Latin Elasmobranchii (plural), from Greek elasmos 'beaten metal' + brankhia 'gills'