Meanings
Origin
From left brain + -er, due to the belief that the left side of the brain controls one's logical processes.
Full word history & related roots →Cite this entry
APA
left-brainer. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/left-brainer
MLA
“left-brainer.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/left-brainer. Accessed November 2, 2026.
Chicago
WatkinsX Dictionary, s.v. “left-brainer,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/left-brainer.
Source: left-brainer on Wiktionary, CC BY-SA 4.0.