|Definition - Pertaining to the blade of the tongue and the sounds made with it, e.g. sibilants such as /s/, /z/, and /ð/.|
Etymology - The word derives from the Latin lamina, thin piece of metal or wood.
Oxford English Dictionary - Its first citation in this sense is from 1956:
"In all the Central Algonquian dialects … there is … an apical or laminal affricate /c/. The affricate is laminal, with hushing offglide, in those languages … which distinguish two spirants."
(C. F. Hockett in Internat. Jrnl. Amer. Ling. XXII. 202/1)