Does machine code means assembly language?

No. Assembly language is a low-level symbolic language that needs to be translated (assembled) to produce the machine code. The reverse of assembly is disassembly, where machine code is disassembled to produce code that is similar to assembly but has no symbolic names or comments. Disassembly is essentially a human-readable version of machine code whereas assembly is the code written by a human in order to produce the machine code, the only language the machine actually understands.