elasmobranch
noun
elas·mo·branch i-ˈlaz-mə-ˌbraŋk 
plural elasmobranchs
: any of a subclass (Elasmobranchii) of cartilaginous fishes that have five to seven lateral to ventral gill openings on each side and that comprise the sharks, rays, skates, and extinct related fishes
elasmobranch adjective
Example Sentences
Recent Examples on the Web Jasmin Graham specializes in elasmobranch ecology and evolution. 
Jennifer Maas, Variety, 16 June 2022 Before its placement onto the Endangered Species List in 2003, little was known about the elasmobranch, a subclass of fish comprised of sharks, rays, and skates. Elizabeth Gamillo, Smithsonian Magazine, 13 Apr. 2021 Joining sharks and rays in the elasmobranch clan, sawfish are built over a cartilaginous frame that works in concert with a low profile and flat belly to allow efficient movement through whisper-thin depths. David A. Brown, Field & Stream, 13 Dec. 2019 The species, Pseudobatos buthi or the spadenose, is an elasmobranch, a group that includes the sharks, rays and skates. Danielle Hall, Smithsonian, 10 Sep. 2019
Jennifer Maas, Variety, 16 June 2022 Before its placement onto the Endangered Species List in 2003, little was known about the elasmobranch, a subclass of fish comprised of sharks, rays, and skates. Elizabeth Gamillo, Smithsonian Magazine, 13 Apr. 2021 Joining sharks and rays in the elasmobranch clan, sawfish are built over a cartilaginous frame that works in concert with a low profile and flat belly to allow efficient movement through whisper-thin depths. David A. Brown, Field & Stream, 13 Dec. 2019 The species, Pseudobatos buthi or the spadenose, is an elasmobranch, a group that includes the sharks, rays and skates. Danielle Hall, Smithsonian, 10 Sep. 2019 Word History
Etymology
ultimately from Greek elasmos metal plate (from elaunein) + branchia gills
First Known Use
1872, in the meaning defined above
Medical Definition
elasmobranch
noun
elas·mo·branch i-ˈlaz-mə-ˌbraŋk
plural elasmobranchs
: any fish of the class Chondrichthyes