Definition from Wiktionary, the free dictionary
sigmoidal (not comparable)
- (statistics) Characterized by a sigmoid curve or function
2009 January 7, Jeffrey R. Moffitt et al., “Intersubunit coordination in a homomeric ring ATPase”, Nature, volume 457, number 7228, DOI:10.1038/nature07637:
- The requirement […] typically results in a sigmoidal dependence on [ATP] 38 —the hallmark of binding cooperativity.