An Etymological Dictionary of Astronomy and Astrophysics

1. General: A surface regarded as the common boundary of two bodies, or two parts of a system, whether material or non-material.
   

2. Astro.: The intersection zone between a hot → H II region and its → associated molecular cloud.
   

3. Chemistry: The area where two immiscible phases of a dispersion come into contact.
   

4. Computers: A mechanical equipment or logical program that communicates information from one system of computing devices or programs to another.

See also: → inter- + → face.