Also found in: Encyclopedia, Wikipedia.
(Mathematics) a geometric curve whose two branches meet in a cusp at the origin and are asymptotic to a line parallel to the y-axis. Its equation is y2(2a – x)=x3 where 2a is the distance between the y-axis and this line
(Mathematics) contained between the concave sides of two intersecting curves. Compare sistroid
[C17: from Greek kissoeidēs, literally: ivy-shaped, from kissos ivy]