1. having an S-shaped curve; resembling the letter S
Usage: technical; mathematics; biology

Examples

• The sigmoidal growth curve shows rapid initial growth that levels off over time.
• Bacteria populations often follow a sigmoidal pattern in laboratory cultures.
• The sigmoidal function is commonly used in neural networks.
• The river’s sigmoidal path winds through the valley.
• Sigmoidal curves appear frequently in dose-response studies.
• The sigmoidal shape of the colon gives it its distinctive appearance.