Axons. The axon project from the neuron to conduct electrical impulses.

A Tornado. "Gustnadoes" are small, weak tornadoes that do not stay on the ground for very long.

XYY Syndrome. XYY has been found in people like Charles Manson.

Arid. The word "arid" indicates an extremely dry climate.

Gemini. The Clown Face Nebula is also in the Gemini constellation.

Rotorcraft. A rotorcraft uses lift created by rotor blades.