Am I reading it right that a tamal is basically a burrito steamed in a corn husk?

Corn isn't as pervasive in the Europes and Asia, but I'm sometimes making something approaching a burrito, in a wheat-based wrapping — sort of a Mexiconized shawarma. Heard of tamales a bunch of times, and could get a corn tortilla for it, but not sure what steaming adds outside of making the whole thing softer.