etaoin shrdlu

eta·​oin shrd·​lu | \ ˈet|ēˌȯinˈshərdˌlü, ˈēt|, ˈāt|, |əˌȯi-, -n(ˌ)shərdˈlü \
plural -s

Definition of etaoin shrdlu

: a combination of letters set by running a finger down the first and then the second left-hand vertical banks of six keys of a Linotype machine to produce a temporary marking slug not intended to appear in the final printing

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“Etaoin shrdlu.” Dictionary, Merriam-Webster, Accessed 27 Feb. 2021.

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