sigmoidalWiktionary 原文英美构词拆解sigmoidsigmoid词干al-al后缀-alOf or pertaining to. Adjectival suffix appended to various words, often nouns, to produce an adjective form. Often added to words of Latin origin, but used with other words also. · Forming nouns, especially of verbal action.词源说明From sigmoid + -al.释义形容词adjective1sigmoid; S-shaped.2(statistics) Characterized by a sigmoid curve or function名词noun1A sigmoidal function or curve同族词派生词 5