But near the center was a double cone with no lights showing at all.

The double cone with lights only in the top half."

He held a small double cone in his hand.

Also it contains double cones, which most mammals do not have.

In geometry, a nappe is half of a double cone.

Most fish have double cones, a pair of cone cells joined to each other.

It seemed to be a spindle or double cone, rolling along the ridge.

Far ahead of him he could make out lacy lines sketching a long double cone.

There are many gap junctions between the cells of fish double cones.

He also states that the single cones are usually smaller than the individual members of the double cones.

Either half of a double cone on one side of the apex is called a 'nappe'.

The fabric of the ridge and double cone tore and curled, exposing the reality beyond.

They were on the lip of a funnel, at the truncated tip of the double cone.

As they approached, they could see another cone behind it-the city was a double cone!

Built like a double cone.

Its double cone forms the limit of a trachytic belt which stands out distinctly in the mountain system of the island.

The hyperbola is a section of a right circular, double cone having a steeper slope than the cone.

At the same time, they have cells called "double cones" which give them sharp color vision and enable them to see ultraviolet wavelengths.

A variety of double cone exists that allows two scoops of ice cream to be served side by side.

When the boss Kzin had left the room, he'd carried a gun handle attached to a double cone with rounded bases and points that barely touched.

The Grossring, together with two other ringlasers, was able to measure the daily Earth wobble, where the Earth axis moves in a double cone.

If the plane passes through the central apex of the double cone a degenerate hyperbola results - two straight lines that cross at the apex point.

In a book about vision in fishes, James Bowmaker writes that double cones tend to be sensitive to longer wavelengths of light than single cones.

The other major types of conic sections are the ellipse and the parabola; in these cases, the plane cuts through only one half of the double cone.