UNDERLAYER
Etymology
Noun
underlayer (plural underlayers)
A layer that is below another layer.
Synonyms: substrate, substratum
(mining) A perpendicular shaft sunk to cut the lode at any required depth.
One who underlays.
Verb
underlayer (third-person singular simple present underlayers, present participle underlayering, simple past and past participle underlayered)
To form a layer beneath another
Anagrams
• unreaderly
Source: Wiktionary
Un"der*lay`er, n.
1. One who, or that which, underlays or is underlaid; a lower layer.
2. (Mining)
Definition: A perpendicular shaft sunk to cut the lode at any required
depth. Weale.
Source: Webster’s Unabridged Dictionary 1913 Edition