Meanings
nounsimian crease (plural simian creases)
plural simian creases
- anatomyA crease that extends across the palm of the human hand, formed by the fusion of the two palmar creases, found especially in people with Down syndrome.
Synonyms: simian line
Synonyms & antonyms
nounA crease that extends across the palm of the human hand, formed by the fusion of the two palmar creases, found especially in people with Down syndrome.
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Also see
Origin
So called because it resembles the usual condition of non-human simians.
Full word history & related roots →Cite this entry
APA
simian crease. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/simian%20crease
MLA
“simian crease.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/simian%20crease. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “simian crease,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/simian%20crease.
Source: simian crease on Wiktionary, CC BY-SA 4.0.