1660s, "to beat or roll into thin plates," from Latin lamina "thin piece of metal or wood, thin slice, plate, leaf, layer," a word of unknown origin; de Vaan writes that "The only serious etymology offered is a connection with latus 'wide' ...." Many modern senses in English are from the noun meaning "an artificial thin layer" (1939), especially a type of plastic adhesive. Related: Laminated; laminating; laminable.
word-formation element meaning "pertaining to, of the nature of," from Latin -arem, -aris "of the kind of, belonging to," a secondary form (by dissimilation) of -alis, used after syllables with an -l- (such as insularis for *insulalis, stellaris for *stellalis).
<a href="https://www.etymonline.com/word/laminar">Etymology of laminar by etymonline</a>
Harper, D. (n.d.). Etymology of laminar. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/laminar