/i las"meuh brangk', i laz"-/ , adj.
1. belonging or pertaining to the Elasmobranchii, the subclass of cartilaginous fishes comprising the sharks and rays.
n.
2. an elasmobranch fish.
[ 1870-75; Elasmobranchii, equiv. to Gk elasm ( ós ) beaten metal (deriv. of elaúnein; see ELASTIC) + -o- -O- + -branchii, pl. of -BRANCHIUS, NL coinage based on Gk bránchia BRANCHIA ]