oystershell scale

[ oi-ster-shel ]
/ ˈɔɪ stərˌʃɛl /


a scale insect, Lepidosaphes ulmi, having a scale shaped like the shell of an oyster, which infests various deciduous trees and shrubs.

Origin of oystershell scale

An Americanism dating back to 1875–80; oyster + shell
Also called oyster scale.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019