'delamination' originates from the noun 'lamination' with the prefix 'de-'. 'Lamination' comes from Latin 'lamina' meaning 'thin plate, layer', and the prefix 'de-' indicates removal or reversal.

'lamina' (Latin) gave rise to the noun 'lamination' in Modern English to mean the process of forming layers; the formation 'de-' + 'lamination' produced the term 'delamination' in technical usage (20th century) to denote the reversal or failure of lamination.

Initially related to 'lamination' (the act of forming layers); with the prefix 'de-' the modern term came to mean the undoing of that process—specifically the separation or peeling apart of layers.