Er
Er noun - A trivalent metallic element of the rare earth group; occurs with yttrium.
Show all Definitions
Synonyms for Er
Unit
Mutual synonyms
Cite this Source
Unit and Er. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/er/unit
Er & Unit. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/er/unit>.
Unit or Er. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/er/unit.
Google Ngram Viewer shows how "er" and "unit" have occurred on timeline