Microcircuit and Micro chip

Microcircuit noun - A microelectronic computer circuit incorporated into a chip or semiconductor; a whole system rather than a single component.

Micro chip and microcircuit are semantically related. In some cases you can replace phrase "Micro chip" with "Microcircuit", this terms are similar.

Micro chip noun - Electronic equipment consisting of a small crystal of a silicon semiconductor fabricated to carry out a number of electronic functions in an integrated circuit.

Microcircuit and micro chip are semantically related. You can use "Microcircuit" instead a noun phrase "Micro chip".