assembler

noun4

1. •
   One who assembles items.

   • Our father worked as an assembler in a radio factory that would go out of business in the early 1960s, […] — 2014
2. •
   A nanodevice capable of assembling nanodevices, possibly including copies of itself, according to a plan.
3. •
   A program that reads source code written in assembly language and produces executable machine code, possibly together with information needed by linkers, debuggers and other tools.

   • The system includes an 8080 and a Z80 assembler, a Tektronix format downloader and other utilities. — 1982
4. •
   (informal) Assembly language.

   • I wrote that program in assembler.