Also contains definition of: unresolved peak in chromatography

in chromatography
The portion of a differential chromatogram recording the detector response when a single component is eluted from the column. If separation is incomplete, two or more components may be eluted as one unresolved peak.
PAC, 1993, 65, 819 (Nomenclature for chromatography (IUPAC Recommendations 1993)) on page 835
Orange Book, p. 96
Orange Book, p. 101