A system of adjacent @L03488@ or @M04015@. The term @B00643@ applies to the particular case of a multilayer two monolayers thick. Monolayers and multilayers may be alternatively named '@F02366@' provided boundaries can be defined for them.
PAC, 1994, 66, 1667. (Thin films including layers: terminology in relation to their preparation and characterization (IUPAC Recommendations 1994)) on page 1672 [Terms] [Paper]