noun

• (architecture) A double curve in the shape of an elongated S; an object of that shape.
• (architecture) A pointed arch made from two ogees.
• (mathematics) An inflection point.
• (aesthetic facial surgery) The malar or cheekbone prominence transitioning into the mid-cheek hollow.
• (distillation) The bubble-shaped chamber of a pot still that connects the swan neck to the pot and allows distillate to expand, condense, and fall back into the pot.