English

Noun

underlayer ‎(plural underlayers)

1. A layer that is below another layer.
2. (mining) A perpendicular shaft sunk to cut the lode at any required depth.

   (Can we find and add a quotation of Weale to this entry?)

Verb

underlayer ‎(third-person singular simple present underlayers, present participle underlayering, simple past and past participle underlayered)

1. To form a layer beneath another