Any wind instrument with either [a]: a tongue cut directly in its sound tube, [b]: a tongue attached to its tube (which is slotted for that purpose), or [c]: a single reed inserted in an open tube, is generally defined as a (primitive) clarinet; ➺ Shawm.

Directly cut tongue: idioglot; Attached tongue: heteroglot; Inserted reed: either, depending on the build of the reed; ➺ Single reed(s).