elasm-
has plate-like elements:
has plate-like elements:
elasmobranch, elasmosaur
elasm-
combining form 
or elasmo-
Etymology: French élasm- & New Latin elasmo-, from Greek elasmos metal plate; akin to Greek elaunein to drive — more at elastic 
 : plate 
< Elasmobranchii >
or elasmo-
< Elasmobranchii >