Definition of molecular layer in US English:

molecular layer

noun

  • 1A layer of molecules.

  • 2Histology. Any of several layers of neural tissue composed chiefly of the terminal branchings of axons and dendrites, with relatively few cell bodies (also called plexiform layer); especially (a) either of two such layers of the retina; (b) the outermost layer of the cerebral and cerebellar cortex.

Origin

Mid 19th century; earliest use found in Scientific American. From molecular + layer.

Pronunciation

molecular layer

/məˌlɛkjʊlə ˈleɪə/