- Similarly a cubic through the two circular points is termed a circular cubic; a quartic through the two points is termed a circular quartic, and if it passes twice through each of them, that is, has each of them for a node, it is termed a bicircular quartic. Such a quartic is of course binodal (m = 4, 6= 2, K = o); it has not in general, but it may have, a third node or a cusp. Or again, we may have a quartic curve having a cusp at each of the circular points: such a curve is a " Cartesian," it being a complete definition of the Cartesian to say that it is a
**bicuspidal**quartic curve (m= 4, 6 = o, K= 2), having a cusp at each of the circular points.

- bicupola
- bicurious
- bicuspid
- bicuspid valve
- bicuspidal

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