Refers to making nanoscale structures by machining and etching techniques.

Source

A general approach going from large items to smaller ones. The opposite of bottom up. In a lithographic sense it means to produce micro- or nanoscaled structures using macroscopic instruments. The most common method is photolithography, which is capable of producing sub-100 nm features. Other examples are electron beam lithography (EBL) and scanning probe lithography (SPN).

Source

Refers to making nanoscale structures by machining and etching techniques.

Source

Molding, carving and fabricating small materials and components by using larger objects such as our hands, tools and lasers.

Source

The building of small machines and materials (via carving, molding, or machining), using larger items such as tools and lasers.

Source