mid-17c., noun of action from crust (v.).
Fight Off The Fantods With This Word Of The Day QuizThe upper crust might make a fuss over this week's Word of the Day Quiz. | March 11 – 17, 2019
Using These Words Will Make You Sound Like You’re From New YorkNew York English carries what linguists call a non-rhotic accent, with speakers often dropping Rs that are followed by another consonant. Here's what we mean.
- crustal plate,
Online Etymology Dictionary, © 2010 Douglas Harper
Examples from the Web for crustation
This crustation consists of basic copper carbonate, the result of exposure to the air.Chats on Old Copper and Brass|Fred. W. Burgess