https://doi.org/10.1351/goldbook.M04015
A single, closely packed
layer
of atoms or molecules. The term floating monolayer is used for certain spread monolayers or
films
which are in the condensed — often solid — state. The term
Langmuir monolayer
has recently been coined for spread monolayers. This usage is not recommended.
Source:
PAC, 1994, 66, 1667. (Thin films including layers: terminology in relation to their preparation and characterization (IUPAC Recommendations 1994)) on page 1672 [Terms] [Paper]
See also:
Orange Book, 2nd ed., p. 251 [Terms] [Book]