They make a noodle out of dosa batter with an extruder made specifically for the dish.
1560s, from Latin extrudere "to thrust out, drive away," from ex- "out" (see ex-) + trudere "to thrust" (see extrusion). Related: Extruded; extruding.
extrude ex·trude (ĭk-strōōd')v. ex·trud·ed, ex·trud·ing, ex·trudes
To thrust, force, or press out.
To protrude or project.