opposable thumb

noun

A thumb that can be positioned so that it faces the opposite direction from that of the other fingers, especially the smallest finger, of the same hand.

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Meanings

nounopposable thumb (plural opposable thumbs)

plural opposable thumbs

  1. A thumb that can be positioned so that it faces the opposite direction from that of the other fingers, especially the smallest finger, of the same hand.
Cite this entry
APA

opposable thumb. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/opposable%20thumb

MLA

“opposable thumb.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/opposable%20thumb. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “opposable thumb,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/opposable%20thumb.

Source: opposable thumb on Wiktionary, CC BY-SA 4.0.